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packages/deprecated/jquery-layout/jquery.layout.js

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/**
 * @preserve
 * jquery.layout 1.3.0 - Release Candidate 30.79
 * $Date: 2013-01-12 08:00:00 (Sat, 12 Jan 2013) $
 * $Rev: 303007 $
 *
 * Copyright (c) 2012 
 *   Fabrizio Balliano (http://www.fabrizioballiano.net)
 *   Kevin Dalman (http://allpro.net)
 *
 * Dual licensed under the GPL (http://www.gnu.org/licenses/gpl.html)
 * and MIT (http://www.opensource.org/licenses/mit-license.php) licenses.
 *
 * Changelog: http://layout.jquery-dev.net/changelog.cfm#1.3.0.rc30.79
 *
 * Docs: http://layout.jquery-dev.net/documentation.html
 * Tips: http://layout.jquery-dev.net/tips.html
 * Help: http://groups.google.com/group/jquery-ui-layout
 */

/* JavaDoc Info: http://code.google.com/closure/compiler/docs/js-for-compiler.html
 * {!Object}    non-nullable type (never NULL)
 * {?string}    nullable type (sometimes NULL) - default for {Object}
 * {number=}    optional parameter
 * {*}            ALL types
 */
/*    TODO for jQ 2.0 
 *    change .andSelf() to .addBack()
 *    $.fn.disableSelection won't work
 */

// NOTE: For best readability, view with a fixed-width font and tabs equal to 4-chars

;(function ($) {

// alias Math methods - used a lot!
var    min        = Math.min
,    max        = Math.max
,    round    = Math.floor

,    isStr    =  function (v) { return $.type(v) === "string"; }

    /**
    * @param {!Object}            Instance
    * @param {Array.<string>}    a_fn
    */
,    runPluginCallbacks = function (Instance, a_fn) {
        if ($.isArray(a_fn))
            for (var i=0, c=a_fn.length; i<c; i++) {
                var fn = a_fn[i];
                try {
                    if (isStr(fn)) // 'name' of a function
                        fn = eval(fn);
                    if ($.isFunction(fn))
                        g(fn)( Instance );
                } catch (ex) {}
            }
        function g (f) { return f; }; // compiler hack
    }
;

/*
 *    GENERIC $.layout METHODS - used by all layouts
 */
$.layout = {

    version:    "1.3.rc30.79"
,    revision:    0.033007 // 1.3.0 final = 1.0300 - major(n+).minor(nn)+patch(nn+)

    // $.layout.browser REPLACES $.browser
,    browser:    {} // set below

    // *PREDEFINED* EFFECTS & DEFAULTS 
    // MUST list effect here - OR MUST set an fxSettings option (can be an empty hash: {})
,    effects: {

    //    Pane Open/Close Animations
        slide: {
            all:    { duration:  "fast"    } // eg: duration: 1000, easing: "easeOutBounce"
        ,    north:    { direction: "up"    }
        ,    south:    { direction: "down"    }
        ,    east:    { direction: "right"}
        ,    west:    { direction: "left"    }
        }
    ,    drop: {
            all:    { duration:  "slow"    }
        ,    north:    { direction: "up"    }
        ,    south:    { direction: "down"    }
        ,    east:    { direction: "right"}
        ,    west:    { direction: "left"    }
        }
    ,    scale: {
            all:    { duration:    "fast"    }
        }
    //    these are not recommended, but can be used
    ,    blind:        {}
    ,    clip:        {}
    ,    explode:    {}
    ,    fade:        {}
    ,    fold:        {}
    ,    puff:        {}

    //    Pane Resize Animations
    ,    size: {
            all:    { easing:    "swing"    }
        }
    }

    // INTERNAL CONFIG DATA - DO NOT CHANGE THIS!
,    config: {
        optionRootKeys:    "effects,panes,north,south,west,east,center".split(",")
    ,    allPanes:        "north,south,west,east,center".split(",")
    ,    borderPanes:    "north,south,west,east".split(",")
    ,    oppositeEdge: {
            north:    "south"
        ,    south:    "north"
        ,    east:     "west"
        ,    west:     "east"
        }
    //    offscreen data
    ,    offscreenCSS:    { left: "-99999px", right: "auto" } // used by hide/close if useOffscreenClose=true
    ,    offscreenReset:    "offscreenReset" // key used for data
    //    CSS used in multiple places
    ,    hidden:        { visibility: "hidden" }
    ,    visible:    { visibility: "visible" }
    //    layout element settings
    ,    resizers: {
            cssReq: {
                position:     "absolute"
            ,    padding:     0
            ,    margin:     0
            ,    fontSize:    "1px"
            ,    textAlign:    "left"    // to counter-act "center" alignment!
            ,    overflow:     "hidden" // prevent toggler-button from overflowing
            //    SEE $.layout.defaults.zIndexes.resizer_normal
            }
        ,    cssDemo: { // DEMO CSS - applied if: options.PANE.applyDemoStyles=true
                background: "#DDD"
            ,    border:        "none"
            }
        }
    ,    togglers: {
            cssReq: {
                position:     "absolute"
            ,    display:     "block"
            ,    padding:     0
            ,    margin:     0
            ,    overflow:    "hidden"
            ,    textAlign:    "center"
            ,    fontSize:    "1px"
            ,    cursor:     "pointer"
            ,    zIndex:     1
            }
        ,    cssDemo: { // DEMO CSS - applied if: options.PANE.applyDemoStyles=true
                background: "#AAA"
            }
        }
    ,    content: {
            cssReq: {
                position:    "relative" /* contain floated or positioned elements */
            }
        ,    cssDemo: { // DEMO CSS - applied if: options.PANE.applyDemoStyles=true
                overflow:    "auto"
            ,    padding:    "10px"
            }
        ,    cssDemoPane: { // DEMO CSS - REMOVE scrolling from 'pane' when it has a content-div
                overflow:    "hidden"
            ,    padding:    0
            }
        }
    ,    panes: { // defaults for ALL panes - overridden by 'per-pane settings' below
            cssReq: {
                position:     "absolute"
            ,    margin:        0
            //    $.layout.defaults.zIndexes.pane_normal
            }
        ,    cssDemo: { // DEMO CSS - applied if: options.PANE.applyDemoStyles=true
                padding:    "10px"
            ,    background:    "#FFF"
            ,    border:        "1px solid #BBB"
            ,    overflow:    "auto"
            }
        }
    ,    north: {
            side:            "top"
        ,    sizeType:        "Height"
        ,    dir:            "horz"
        ,    cssReq: {
                top:         0
            ,    bottom:     "auto"
            ,    left:         0
            ,    right:         0
            ,    width:         "auto"
            //    height:     DYNAMIC
            }
        }
    ,    south: {
            side:            "bottom"
        ,    sizeType:        "Height"
        ,    dir:            "horz"
        ,    cssReq: {
                top:         "auto"
            ,    bottom:     0
            ,    left:         0
            ,    right:         0
            ,    width:         "auto"
            //    height:     DYNAMIC
            }
        }
    ,    east: {
            side:            "right"
        ,    sizeType:        "Width"
        ,    dir:            "vert"
        ,    cssReq: {
                left:         "auto"
            ,    right:         0
            ,    top:         "auto" // DYNAMIC
            ,    bottom:     "auto" // DYNAMIC
            ,    height:     "auto"
            //    width:         DYNAMIC
            }
        }
    ,    west: {
            side:            "left"
        ,    sizeType:        "Width"
        ,    dir:            "vert"
        ,    cssReq: {
                left:         0
            ,    right:         "auto"
            ,    top:         "auto" // DYNAMIC
            ,    bottom:     "auto" // DYNAMIC
            ,    height:     "auto"
            //    width:         DYNAMIC
            }
        }
    ,    center: {
            dir:            "center"
        ,    cssReq: {
                left:         "auto" // DYNAMIC
            ,    right:         "auto" // DYNAMIC
            ,    top:         "auto" // DYNAMIC
            ,    bottom:     "auto" // DYNAMIC
            ,    height:     "auto"
            ,    width:         "auto"
            }
        }
    }

    // CALLBACK FUNCTION NAMESPACE - used to store reusable callback functions
,    callbacks: {}

,    getParentPaneElem: function (el) {
        // must pass either a container or pane element
        var $el = $(el)
        ,    layout = $el.data("layout") || $el.data("parentLayout");
        if (layout) {
            var $cont = layout.container;
            // see if this container is directly-nested inside an outer-pane
            if ($cont.data("layoutPane")) return $cont;
            var $pane = $cont.closest("."+ $.layout.defaults.panes.paneClass);
            // if a pane was found, return it
            if ($pane.data("layoutPane")) return $pane;
        }
        return null;
    }

,    getParentPaneInstance: function (el) {
        // must pass either a container or pane element
        var $pane = $.layout.getParentPaneElem(el);
        return $pane ? $pane.data("layoutPane") : null;
    }

,    getParentLayoutInstance: function (el) {
        // must pass either a container or pane element
        var $pane = $.layout.getParentPaneElem(el);
        return $pane ? $pane.data("parentLayout") : null;
    }

,    getEventObject: function (evt) {
        return typeof evt === "object" && evt.stopPropagation ? evt : null;
    }
,    parsePaneName: function (evt_or_pane) {
        var evt = $.layout.getEventObject( evt_or_pane )
        ,    pane = evt_or_pane;
        if (evt) {
            // ALWAYS stop propagation of events triggered in Layout!
            evt.stopPropagation();
            pane = $(this).data("layoutEdge");
        }
        if (pane && !/^(west|east|north|south|center)$/.test(pane)) {
            $.layout.msg('LAYOUT ERROR - Invalid pane-name: "'+ pane +'"');
            pane = "error";
        }
        return pane;
    }


    // LAYOUT-PLUGIN REGISTRATION
    // more plugins can added beyond this default list
,    plugins: {
        draggable:        !!$.fn.draggable // resizing
    ,    effects: {
            core:        !!$.effects        // animimations (specific effects tested by initOptions)
        ,    slide:        $.effects && ($.effects.slide || ($.effects.effect && $.effects.effect.slide)) // default effect
        }
    }

//    arrays of plugin or other methods to be triggered for events in *each layout* - will be passed 'Instance'
,    onCreate:    []    // runs when layout is just starting to be created - right after options are set
,    onLoad:        []    // runs after layout container and global events init, but before initPanes is called
,    onReady:    []    // runs after initialization *completes* - ie, after initPanes completes successfully
,    onDestroy:    []    // runs after layout is destroyed
,    onUnload:    []    // runs after layout is destroyed OR when page unloads
,    afterOpen:    []    // runs after setAsOpen() completes
,    afterClose:    []    // runs after setAsClosed() completes

    /*
    *    GENERIC UTILITY METHODS
    */

    // calculate and return the scrollbar width, as an integer
,    scrollbarWidth:        function () { return window.scrollbarWidth  || $.layout.getScrollbarSize('width'); }
,    scrollbarHeight:    function () { return window.scrollbarHeight || $.layout.getScrollbarSize('height'); }
,    getScrollbarSize:    function (dim) {
        var $c    = $('<div style="position: absolute; top: -10000px; left: -10000px; width: 100px; height: 100px; overflow: scroll;"></div>').appendTo("body");
        var d    = { width: $c.css("width") - $c[0].clientWidth, height: $c.height() - $c[0].clientHeight };
        $c.remove();
        window.scrollbarWidth    = d.width;
        window.scrollbarHeight    = d.height;
        return dim.match(/^(width|height)$/) ? d[dim] : d;
    }


    /**
    * Returns hash container 'display' and 'visibility'
    *
    * @see    $.swap() - swaps CSS, runs callback, resets CSS
    * @param  {!Object}        $E                jQuery element
    * @param  {boolean=}    [force=false]    Run even if display != none
    * @return {!Object}                        Returns current style props, if applicable
    */
,    showInvisibly: function ($E, force) {
        if ($E && $E.length && (force || $E.css("display") === "none")) { // only if not *already hidden*
            var s = $E[0].style
                // save ONLY the 'style' props because that is what we must restore
            ,    CSS = { display: s.display || '', visibility: s.visibility || '' };
            // show element 'invisibly' so can be measured
            $E.css({ display: "block", visibility: "hidden" });
            return CSS;
        }
        return {};
    }

    /**
    * Returns data for setting size of an element (container or a pane).
    *
    * @see  _create(), onWindowResize() for container, plus others for pane
    * @return JSON  Returns a hash of all dimensions: top, bottom, left, right, outerWidth, innerHeight, etc
    */
,    getElementDimensions: function ($E, inset) {
        var
        //    dimensions hash - start with current data IF passed
            d    = { css: {}, inset: {} }
        ,    x    = d.css            // CSS hash
        ,    i    = { bottom: 0 }    // TEMP insets (bottom = complier hack)
        ,    N    = $.layout.cssNum
        ,    off = $E.offset()
        ,    b, p, ei            // TEMP border, padding
        ;
        d.offsetLeft = off.left;
        d.offsetTop  = off.top;

        if (!inset) inset = {}; // simplify logic below

        $.each("Left,Right,Top,Bottom".split(","), function (idx, e) { // e = edge
            b = x["border" + e] = $.layout.borderWidth($E, e);
            p = x["padding"+ e] = $.layout.cssNum($E, "padding"+e);
            ei = e.toLowerCase();
            d.inset[ei] = inset[ei] >= 0 ? inset[ei] : p; // any missing insetX value = paddingX
            i[ei] = d.inset[ei] + b; // total offset of content from outer side
        });

        x.width        = $E.width();
        x.height    = $E.height();
        x.top        = N($E,"top",true);
        x.bottom    = N($E,"bottom",true);
        x.left        = N($E,"left",true);
        x.right        = N($E,"right",true);

        d.outerWidth    = $E.outerWidth();
        d.outerHeight    = $E.outerHeight();
        // calc the TRUE inner-dimensions, even in quirks-mode!
        d.innerWidth    = max(0, d.outerWidth  - i.left - i.right);
        d.innerHeight    = max(0, d.outerHeight - i.top  - i.bottom);
        // layoutWidth/Height is used in calcs for manual resizing
        // layoutW/H only differs from innerW/H when in quirks-mode - then is like outerW/H
        d.layoutWidth    = $E.innerWidth();
        d.layoutHeight    = $E.innerHeight();

        //if ($E.prop('tagName') === 'BODY') { debugData( d, $E.prop('tagName') ); } // DEBUG

        //d.visible    = $E.is(":visible");// && x.width > 0 && x.height > 0;

        return d;
    }

,    getElementStyles: function ($E, list) {
        var
            CSS    = {}
        ,    style    = $E[0].style
        ,    props    = list.split(",")
        ,    sides    = "Top,Bottom,Left,Right".split(",")
        ,    attrs    = "Color,Style,Width".split(",")
        ,    p, s, a, i, j, k
        ;
        for (i=0; i < props.length; i++) {
            p = props[i];
            if (p.match(/(border|padding|margin)$/))
                for (j=0; j < 4; j++) {
                    s = sides[j];
                    if (p === "border")
                        for (k=0; k < 3; k++) {
                            a = attrs[k];
                            CSS[p+s+a] = style[p+s+a];
                        }
                    else
                        CSS[p+s] = style[p+s];
                }
            else
                CSS[p] = style[p];
        };
        return CSS
    }

    /**
    * Return the innerWidth for the current browser/doctype
    *
    * @see  initPanes(), sizeMidPanes(), initHandles(), sizeHandles()
    * @param  {Array.<Object>}    $E  Must pass a jQuery object - first element is processed
    * @param  {number=}            outerWidth (optional) Can pass a width, allowing calculations BEFORE element is resized
    * @return {number}            Returns the innerWidth of the elem by subtracting padding and borders
    */
,    cssWidth: function ($E, outerWidth) {
        // a 'calculated' outerHeight can be passed so borders and/or padding are removed if needed
        if (outerWidth <= 0) return 0;

        var bs    = !$.layout.browser.boxModel ? "border-box" : $.support.boxSizing ? $E.css("boxSizing") : "content-box"
        ,    b    = $.layout.borderWidth
        ,    n    = $.layout.cssNum
        ,    W    = outerWidth
        ;
        // strip border and/or padding from outerWidth to get CSS Width
        if (bs !== "border-box")
            W -= (b($E, "Left") + b($E, "Right"));
        if (bs === "content-box")
            W -= (n($E, "paddingLeft") + n($E, "paddingRight"));
        return max(0,W);
    }

    /**
    * Return the innerHeight for the current browser/doctype
    *
    * @see  initPanes(), sizeMidPanes(), initHandles(), sizeHandles()
    * @param  {Array.<Object>}    $E  Must pass a jQuery object - first element is processed
    * @param  {number=}            outerHeight  (optional) Can pass a width, allowing calculations BEFORE element is resized
    * @return {number}            Returns the innerHeight of the elem by subtracting padding and borders
    */
,    cssHeight: function ($E, outerHeight) {
        // a 'calculated' outerHeight can be passed so borders and/or padding are removed if needed
        if (outerHeight <= 0) return 0;

        var bs    = !$.layout.browser.boxModel ? "border-box" : $.support.boxSizing ? $E.css("boxSizing") : "content-box"
        ,    b    = $.layout.borderWidth
        ,    n    = $.layout.cssNum
        ,    H    = outerHeight
        ;
        // strip border and/or padding from outerHeight to get CSS Height
        if (bs !== "border-box")
            H -= (b($E, "Top") + b($E, "Bottom"));
        if (bs === "content-box")
            H -= (n($E, "paddingTop") + n($E, "paddingBottom"));
        return max(0,H);
    }

    /**
    * Returns the 'current CSS numeric value' for a CSS property - 0 if property does not exist
    *
    * @see  Called by many methods
    * @param {Array.<Object>}    $E                    Must pass a jQuery object - first element is processed
    * @param {string}            prop                The name of the CSS property, eg: top, width, etc.
    * @param {boolean=}            [allowAuto=false]    true = return 'auto' if that is value; false = return 0
    * @return {(string|number)}                        Usually used to get an integer value for position (top, left) or size (height, width)
    */
,    cssNum: function ($E, prop, allowAuto) {
        if (!$E.jquery) $E = $($E);
        var CSS = $.layout.showInvisibly($E)
        ,    p    = $.css($E[0], prop, true)
        ,    v    = allowAuto && p=="auto" ? p : Math.round(parseFloat(p) || 0);
        $E.css( CSS ); // RESET
        return v;
    }

,    borderWidth: function (el, side) {
        if (el.jquery) el = el[0];
        var b = "border"+ side.substr(0,1).toUpperCase() + side.substr(1); // left => Left
        return $.css(el, b+"Style", true) === "none" ? 0 : Math.round(parseFloat($.css(el, b+"Width", true)) || 0);
    }

    /**
    * Mouse-tracking utility - FUTURE REFERENCE
    *
    * init: if (!window.mouse) {
    *            window.mouse = { x: 0, y: 0 };
    *            $(document).mousemove( $.layout.trackMouse );
    *        }
    *
    * @param {Object}        evt
    *
,    trackMouse: function (evt) {
        window.mouse = { x: evt.clientX, y: evt.clientY };
    }
    */

    /**
    * SUBROUTINE for preventPrematureSlideClose option
    *
    * @param {Object}        evt
    * @param {Object=}        el
    */
,    isMouseOverElem: function (evt, el) {
        var
            $E    = $(el || this)
        ,    d    = $E.offset()
        ,    T    = d.top
        ,    L    = d.left
        ,    R    = L + $E.outerWidth()
        ,    B    = T + $E.outerHeight()
        ,    x    = evt.pageX    // evt.clientX ?
        ,    y    = evt.pageY    // evt.clientY ?
        ;
        // if X & Y are < 0, probably means is over an open SELECT
        return ($.layout.browser.msie && x < 0 && y < 0) || ((x >= L && x <= R) && (y >= T && y <= B));
    }

    /**
    * Message/Logging Utility
    *
    * @example $.layout.msg("My message");                // log text
    * @example $.layout.msg("My message", true);        // alert text
    * @example $.layout.msg({ foo: "bar" }, "Title");    // log hash-data, with custom title
    * @example $.layout.msg({ foo: "bar" }, true, "Title", { sort: false }); -OR-
    * @example $.layout.msg({ foo: "bar" }, "Title", { sort: false, display: true }); // alert hash-data
    *
    * @param {(Object|string)}            info            String message OR Hash/Array
    * @param {(Boolean|string|Object)=}    [popup=false]    True means alert-box - can be skipped
    * @param {(Object|string)=}            [debugTitle=""]    Title for Hash data - can be skipped
    * @param {Object=}                    [debugOpts]        Extra options for debug output
    */
,    msg: function (info, popup, debugTitle, debugOpts) {
        if ($.isPlainObject(info) && window.debugData) {
            if (typeof popup === "string") {
                debugOpts    = debugTitle;
                debugTitle    = popup;
            }
            else if (typeof debugTitle === "object") {
                debugOpts    = debugTitle;
                debugTitle    = null;
            }
            var t = debugTitle || "log( <object> )"
            ,    o = $.extend({ sort: false, returnHTML: false, display: false }, debugOpts);
            if (popup === true || o.display)
                debugData( info, t, o );
            else if (window.console)
                console.log(debugData( info, t, o ));
        }
        else if (popup)
            alert(info);
        else if (window.console)
            console.log(info);
        else {
            var id    = "#layoutLogger"
            ,    $l = $(id);
            if (!$l.length)
                $l = createLog();
            $l.children("ul").append('<li style="padding: 4px 10px; margin: 0; border-top: 1px solid #CCC;">'+ info.replace(/\</g,"&lt;").replace(/\>/g,"&gt;") +'</li>');
        }

        function createLog () {
            var pos = $.support.fixedPosition ? 'fixed' : 'absolute'
            ,    $e = $('<div id="layoutLogger" style="position: '+ pos +'; top: 5px; z-index: 999999; max-width: 25%; overflow: hidden; border: 1px solid #000; border-radius: 5px; background: #FBFBFB; box-shadow: 0 2px 10px rgba(0,0,0,0.3);">'
                +    '<div style="font-size: 13px; font-weight: bold; padding: 5px 10px; background: #F6F6F6; border-radius: 5px 5px 0 0; cursor: move;">'
                +    '<span style="float: right; padding-left: 7px; cursor: pointer;" title="Remove Console" onclick="$(this).closest(\'#layoutLogger\').remove()">X</span>Layout console.log</div>'
                +    '<ul style="font-size: 13px; font-weight: none; list-style: none; margin: 0; padding: 0 0 2px;"></ul>'
                + '</div>'
                ).appendTo("body");
            $e.css('left', $(window).width() - $e.outerWidth() - 5)
            if ($.ui.draggable) $e.draggable({ handle: ':first-child' });
            return $e;
        };
    }

};


/*
 *    $.layout.browser REPLACES removed $.browser, with extra data
 *    Parsing code here adapted from jQuery 1.8 $.browse
 */
var u = navigator.userAgent.toLowerCase()
,    m = /(chrome)[ \/]([\w.]+)/.exec( u )
    ||    /(webkit)[ \/]([\w.]+)/.exec( u )
    ||    /(opera)(?:.*version|)[ \/]([\w.]+)/.exec( u )
    ||    /(msie) ([\w.]+)/.exec( u )
    ||    u.indexOf("compatible") < 0 && /(mozilla)(?:.*? rv:([\w.]+)|)/.exec( u )
    ||    []
,    b = m[1] || ""
,    v = m[2] || 0
,    ie = b === "msie"
;
$.layout.browser = {
    version:    v
,    safari:        b === "webkit"    // webkit (NOT chrome) = safari
,    webkit:        b === "chrome"    // chrome = webkit
,    msie:        ie
,    isIE6:        ie && v == 6
    // ONLY IE reverts to old box-model - update for older jQ onReady
,    boxModel:    !ie || $.support.boxModel !== false
};
if (b) $.layout.browser[b] = true; // set CURRENT browser
/*    OLD versions of jQuery only set $.support.boxModel after page is loaded
 *    so if this is IE, use support.boxModel to test for quirks-mode (ONLY IE changes boxModel) */
if (ie) $(function(){ $.layout.browser.boxModel = $.support.boxModel; });


// DEFAULT OPTIONS
$.layout.defaults = {
/*
 *    LAYOUT & LAYOUT-CONTAINER OPTIONS
 *    - none of these options are applicable to individual panes
 */
    name:                        ""            // Not required, but useful for buttons and used for the state-cookie
,    containerClass:                "ui-layout-container" // layout-container element
,    inset:                        null        // custom container-inset values (override padding)
,    scrollToBookmarkOnLoad:        true        // after creating a layout, scroll to bookmark in URL (.../page.htm#myBookmark)
,    resizeWithWindow:            true        // bind thisLayout.resizeAll() to the window.resize event
,    resizeWithWindowDelay:        200            // delay calling resizeAll because makes window resizing very jerky
,    resizeWithWindowMaxDelay:    0            // 0 = none - force resize every XX ms while window is being resized
,    maskPanesEarly:                false        // true = create pane-masks on resizer.mouseDown instead of waiting for resizer.dragstart
,    onresizeall_start:            null        // CALLBACK when resizeAll() STARTS    - NOT pane-specific
,    onresizeall_end:            null        // CALLBACK when resizeAll() ENDS    - NOT pane-specific
,    onload_start:                null        // CALLBACK when Layout inits - after options initialized, but before elements
,    onload_end:                    null        // CALLBACK when Layout inits - after EVERYTHING has been initialized
,    onunload_start:                null        // CALLBACK when Layout is destroyed OR onWindowUnload
,    onunload_end:                null        // CALLBACK when Layout is destroyed OR onWindowUnload
,    initPanes:                    true        // false = DO NOT initialize the panes onLoad - will init later
,    showErrorMessages:            true        // enables fatal error messages to warn developers of common errors
,    showDebugMessages:            false        // display console-and-alert debug msgs - IF this Layout version _has_ debugging code!
//    Changing this zIndex value will cause other zIndex values to automatically change
,    zIndex:                        null        // the PANE zIndex - resizers and masks will be +1
//    DO NOT CHANGE the zIndex values below unless you clearly understand their relationships
,    zIndexes: {                                // set _default_ z-index values here...
        pane_normal:            0            // normal z-index for panes
    ,    content_mask:            1            // applied to overlays used to mask content INSIDE panes during resizing
    ,    resizer_normal:            2            // normal z-index for resizer-bars
    ,    pane_sliding:            100            // applied to *BOTH* the pane and its resizer when a pane is 'slid open'
    ,    pane_animate:            1000        // applied to the pane when being animated - not applied to the resizer
    ,    resizer_drag:            10000        // applied to the CLONED resizer-bar when being 'dragged'
    }
,    errors: {
        pane:                    "pane"        // description of "layout pane element" - used only in error messages
    ,    selector:                "selector"    // description of "jQuery-selector" - used only in error messages
    ,    addButtonError:            "Error Adding Button\nInvalid "
    ,    containerMissing:        "UI Layout Initialization Error\nThe specified layout-container does not exist."
    ,    centerPaneMissing:        "UI Layout Initialization Error\nThe center-pane element does not exist.\nThe center-pane is a required element."
    ,    noContainerHeight:        "UI Layout Initialization Warning\nThe layout-container \"CONTAINER\" has no height.\nTherefore the layout is 0-height and hence 'invisible'!"
    ,    callbackError:            "UI Layout Callback Error\nThe EVENT callback is not a valid function."
    }
/*
 *    PANE DEFAULT SETTINGS
 *    - settings under the 'panes' key become the default settings for *all panes*
 *    - ALL pane-options can also be set specifically for each panes, which will override these 'default values'
 */
,    panes: { // default options for 'all panes' - will be overridden by 'per-pane settings'
        applyDemoStyles:         false        // NOTE: renamed from applyDefaultStyles for clarity
    ,    closable:                true        // pane can open & close
    ,    resizable:                true        // when open, pane can be resized 
    ,    slidable:                true        // when closed, pane can 'slide open' over other panes - closes on mouse-out
    ,    initClosed:                false        // true = init pane as 'closed'
    ,    initHidden:             false         // true = init pane as 'hidden' - no resizer-bar/spacing
    //    SELECTORS
    //,    paneSelector:            ""            // MUST be pane-specific - jQuery selector for pane
    ,    contentSelector:        ".ui-layout-content" // INNER div/element to auto-size so only it scrolls, not the entire pane!
    ,    contentIgnoreSelector:    ".ui-layout-ignore"    // element(s) to 'ignore' when measuring 'content'
    ,    findNestedContent:        false        // true = $P.find(contentSelector), false = $P.children(contentSelector)
    //    GENERIC ROOT-CLASSES - for auto-generated classNames
    ,    paneClass:                "ui-layout-pane"    // Layout Pane
    ,    resizerClass:            "ui-layout-resizer"    // Resizer Bar
    ,    togglerClass:            "ui-layout-toggler"    // Toggler Button
    ,    buttonClass:            "ui-layout-button"    // CUSTOM Buttons    - eg: '[ui-layout-button]-toggle/-open/-close/-pin'
    //    ELEMENT SIZE & SPACING
    //,    size:                    100            // MUST be pane-specific -initial size of pane
    ,    minSize:                0            // when manually resizing a pane
    ,    maxSize:                0            // ditto, 0 = no limit
    ,    spacing_open:            6            // space between pane and adjacent panes - when pane is 'open'
    ,    spacing_closed:            6            // ditto - when pane is 'closed'
    ,    togglerLength_open:        50            // Length = WIDTH of toggler button on north/south sides - HEIGHT on east/west sides
    ,    togglerLength_closed:     50            // 100% OR -1 means 'full height/width of resizer bar' - 0 means 'hidden'
    ,    togglerAlign_open:        "center"    // top/left, bottom/right, center, OR...
    ,    togglerAlign_closed:    "center"    // 1 => nn = offset from top/left, -1 => -nn == offset from bottom/right
    ,    togglerContent_open:    ""            // text or HTML to put INSIDE the toggler
    ,    togglerContent_closed:    ""            // ditto
    //    RESIZING OPTIONS
    ,    resizerDblClickToggle:    true        // 
    ,    autoResize:                true        // IF size is 'auto' or a percentage, then recalc 'pixel size' whenever the layout resizes
    ,    autoReopen:                true        // IF a pane was auto-closed due to noRoom, reopen it when there is room? False = leave it closed
    ,    resizerDragOpacity:        1            // option for ui.draggable
    //,    resizerCursor:            ""            // MUST be pane-specific - cursor when over resizer-bar
    ,    maskContents:            false        // true = add DIV-mask over-or-inside this pane so can 'drag' over IFRAMES
    ,    maskObjects:            false        // true = add IFRAME-mask over-or-inside this pane to cover objects/applets - content-mask will overlay this mask
    ,    maskZindex:                null        // will override zIndexes.content_mask if specified - not applicable to iframe-panes
    ,    resizingGrid:            false        // grid size that the resizers will snap-to during resizing, eg: [20,20]
    ,    livePaneResizing:        false        // true = LIVE Resizing as resizer is dragged
    ,    liveContentResizing:    false        // true = re-measure header/footer heights as resizer is dragged
    ,    liveResizingTolerance:    1            // how many px change before pane resizes, to control performance
    //    SLIDING OPTIONS
    ,    sliderCursor:            "pointer"    // cursor when resizer-bar will trigger 'sliding'
    ,    slideTrigger_open:        "click"        // click, dblclick, mouseenter
    ,    slideTrigger_close:        "mouseleave"// click, mouseleave
    ,    slideDelay_open:        300            // applies only for mouseenter event - 0 = instant open
    ,    slideDelay_close:        300            // applies only for mouseleave event (300ms is the minimum!)
    ,    hideTogglerOnSlide:        false        // when pane is slid-open, should the toggler show?
    ,    preventQuickSlideClose:    $.layout.browser.webkit // Chrome triggers slideClosed as it is opening
    ,    preventPrematureSlideClose: false    // handle incorrect mouseleave trigger, like when over a SELECT-list in IE
    //    PANE-SPECIFIC TIPS & MESSAGES
    ,    tips: {
            Open:                "Open"        // eg: "Open Pane"
        ,    Close:                "Close"
        ,    Resize:                "Resize"
        ,    Slide:                "Slide Open"
        ,    Pin:                "Pin"
        ,    Unpin:                "Un-Pin"
        ,    noRoomToOpen:        "Not enough room to show this panel."    // alert if user tries to open a pane that cannot
        ,    minSizeWarning:        "Panel has reached its minimum size"    // displays in browser statusbar
        ,    maxSizeWarning:        "Panel has reached its maximum size"    // ditto
        }
    //    HOT-KEYS & MISC
    ,    showOverflowOnHover:    false        // will bind allowOverflow() utility to pane.onMouseOver
    ,    enableCursorHotkey:        true        // enabled 'cursor' hotkeys
    //,    customHotkey:            ""            // MUST be pane-specific - EITHER a charCode OR a character
    ,    customHotkeyModifier:    "SHIFT"        // either 'SHIFT', 'CTRL' or 'CTRL+SHIFT' - NOT 'ALT'
    //    PANE ANIMATION
    //    NOTE: fxSss_open, fxSss_close & fxSss_size options (eg: fxName_open) are auto-generated if not passed
    ,    fxName:                    "slide"     // ('none' or blank), slide, drop, scale -- only relevant to 'open' & 'close', NOT 'size'
    ,    fxSpeed:                null        // slow, normal, fast, 200, nnn - if passed, will OVERRIDE fxSettings.duration
    ,    fxSettings:                {}            // can be passed, eg: { easing: "easeOutBounce", duration: 1500 }
    ,    fxOpacityFix:            true        // tries to fix opacity in IE to restore anti-aliasing after animation
    ,    animatePaneSizing:        false        // true = animate resizing after dragging resizer-bar OR sizePane() is called
    /*  NOTE: Action-specific FX options are auto-generated from the options above if not specifically set:
        fxName_open:            "slide"        // 'Open' pane animation
        fnName_close:            "slide"        // 'Close' pane animation
        fxName_size:            "slide"        // 'Size' pane animation - when animatePaneSizing = true
        fxSpeed_open:            null
        fxSpeed_close:            null
        fxSpeed_size:            null
        fxSettings_open:        {}
        fxSettings_close:        {}
        fxSettings_size:        {}
    */
    //    CHILD/NESTED LAYOUTS
    ,    children:                null        // Layout-options for nested/child layout - even {} is valid as options
    ,    containerSelector:        ''            // if child is NOT 'directly nested', a selector to find it/them (can have more than one child layout!)
    ,    initChildren:            true        // true = child layout will be created as soon as _this_ layout completes initialization
    ,    destroyChildren:        true        // true = destroy child-layout if this pane is destroyed
    ,    resizeChildren:            true        // true = trigger child-layout.resizeAll() when this pane is resized
    //    EVENT TRIGGERING
    ,    triggerEventsOnLoad:    false        // true = trigger onopen OR onclose callbacks when layout initializes
    ,    triggerEventsDuringLiveResize: true    // true = trigger onresize callback REPEATEDLY if livePaneResizing==true
    //    PANE CALLBACKS
    ,    onshow_start:            null        // CALLBACK when pane STARTS to Show    - BEFORE onopen/onhide_start
    ,    onshow_end:                null        // CALLBACK when pane ENDS being Shown    - AFTER  onopen/onhide_end
    ,    onhide_start:            null        // CALLBACK when pane STARTS to Close    - BEFORE onclose_start
    ,    onhide_end:                null        // CALLBACK when pane ENDS being Closed    - AFTER  onclose_end
    ,    onopen_start:            null        // CALLBACK when pane STARTS to Open
    ,    onopen_end:                null        // CALLBACK when pane ENDS being Opened
    ,    onclose_start:            null        // CALLBACK when pane STARTS to Close
    ,    onclose_end:            null        // CALLBACK when pane ENDS being Closed
    ,    onresize_start:            null        // CALLBACK when pane STARTS being Resized ***FOR ANY REASON***
    ,    onresize_end:            null        // CALLBACK when pane ENDS being Resized ***FOR ANY REASON***
    ,    onsizecontent_start:    null        // CALLBACK when sizing of content-element STARTS
    ,    onsizecontent_end:        null        // CALLBACK when sizing of content-element ENDS
    ,    onswap_start:            null        // CALLBACK when pane STARTS to Swap
    ,    onswap_end:                null        // CALLBACK when pane ENDS being Swapped
    ,    ondrag_start:            null        // CALLBACK when pane STARTS being ***MANUALLY*** Resized
    ,    ondrag_end:                null        // CALLBACK when pane ENDS being ***MANUALLY*** Resized
    }
/*
 *    PANE-SPECIFIC SETTINGS
 *    - options listed below MUST be specified per-pane - they CANNOT be set under 'panes'
 *    - all options under the 'panes' key can also be set specifically for any pane
 *    - most options under the 'panes' key apply only to 'border-panes' - NOT the the center-pane
 */
,    north: {
        paneSelector:            ".ui-layout-north"
    ,    size:                    "auto"        // eg: "auto", "30%", .30, 200
    ,    resizerCursor:            "n-resize"    // custom = url(myCursor.cur)
    ,    customHotkey:            ""            // EITHER a charCode (43) OR a character ("o")
    }
,    south: {
        paneSelector:            ".ui-layout-south"
    ,    size:                    "auto"
    ,    resizerCursor:            "s-resize"
    ,    customHotkey:            ""
    }
,    east: {
        paneSelector:            ".ui-layout-east"
    ,    size:                    200
    ,    resizerCursor:            "e-resize"
    ,    customHotkey:            ""
    }
,    west: {
        paneSelector:            ".ui-layout-west"
    ,    size:                    200
    ,    resizerCursor:            "w-resize"
    ,    customHotkey:            ""
    }
,    center: {
        paneSelector:            ".ui-layout-center"
    ,    minWidth:                0
    ,    minHeight:                0
    }
};

$.layout.optionsMap = {
    // layout/global options - NOT pane-options
    layout: ("name,instanceKey,stateManagement,effects,inset,zIndexes,errors,"
    +    "zIndex,scrollToBookmarkOnLoad,showErrorMessages,maskPanesEarly,"
    +    "outset,resizeWithWindow,resizeWithWindowDelay,resizeWithWindowMaxDelay,"
    +    "onresizeall,onresizeall_start,onresizeall_end,onload,onload_start,onload_end,onunload,onunload_start,onunload_end").split(",")
//    borderPanes: [ ALL options that are NOT specified as 'layout' ]
    // default.panes options that apply to the center-pane (most options apply _only_ to border-panes)
,    center: ("paneClass,contentSelector,contentIgnoreSelector,findNestedContent,applyDemoStyles,triggerEventsOnLoad,"
    +    "showOverflowOnHover,maskContents,maskObjects,liveContentResizing,"
    +    "containerSelector,children,initChildren,resizeChildren,destroyChildren,"
    +    "onresize,onresize_start,onresize_end,onsizecontent,onsizecontent_start,onsizecontent_end").split(",")
    // options that MUST be specifically set 'per-pane' - CANNOT set in the panes (defaults) key
,    noDefault: ("paneSelector,resizerCursor,customHotkey").split(",")
};

/**
 * Processes options passed in converts flat-format data into subkey (JSON) format
 * In flat-format, subkeys are _currently_ separated with 2 underscores, like north__optName
 * Plugins may also call this method so they can transform their own data
 *
 * @param  {!Object}    hash            Data/options passed by user - may be a single level or nested levels
 * @param  {boolean=}    [addKeys=false]    Should the primary layout.options keys be added if they do not exist?
 * @return {Object}                        Returns hash of minWidth & minHeight
 */
$.layout.transformData = function (hash, addKeys) {
    var    json = addKeys ? { panes: {}, center: {} } : {} // init return object
    ,    branch, optKey, keys, key, val, i, c;

    if (typeof hash !== "object") return json; // no options passed

    // convert all 'flat-keys' to 'sub-key' format
    for (optKey in hash) {
        branch    = json;
        val        = hash[ optKey ];
        keys    = optKey.split("__"); // eg: west__size or north__fxSettings__duration
        c        = keys.length - 1;
        // convert underscore-delimited to subkeys
        for (i=0; i <= c; i++) {
            key = keys[i];
            if (i === c) {    // last key = value
                if ($.isPlainObject( val ))
                    branch[key] = $.layout.transformData( val ); // RECURSE
                else
                    branch[key] = val;
            }
            else {
                if (!branch[key])
                    branch[key] = {}; // create the subkey
                // recurse to sub-key for next loop - if not done
                branch = branch[key];
            }
        }
    }
    return json;
};

// INTERNAL CONFIG DATA - DO NOT CHANGE THIS!
$.layout.backwardCompatibility = {
    // data used by renameOldOptions()
    map: {
    //    OLD Option Name:            NEW Option Name
        applyDefaultStyles:            "applyDemoStyles"
    //    CHILD/NESTED LAYOUTS
    ,    childOptions:                "children"
    ,    initChildLayout:            "initChildren"
    ,    destroyChildLayout:            "destroyChildren"
    ,    resizeChildLayout:            "resizeChildren"
    ,    resizeNestedLayout:            "resizeChildren"
    //    MISC Options
    ,    resizeWhileDragging:        "livePaneResizing"
    ,    resizeContentWhileDragging:    "liveContentResizing"
    ,    triggerEventsWhileDragging:    "triggerEventsDuringLiveResize"
    ,    maskIframesOnResize:        "maskContents"
    //    STATE MANAGEMENT
    ,    useStateCookie:                "stateManagement.enabled"
    ,    "cookie.autoLoad":            "stateManagement.autoLoad"
    ,    "cookie.autoSave":            "stateManagement.autoSave"
    ,    "cookie.keys":                "stateManagement.stateKeys"
    ,    "cookie.name":                "stateManagement.cookie.name"
    ,    "cookie.domain":            "stateManagement.cookie.domain"
    ,    "cookie.path":                "stateManagement.cookie.path"
    ,    "cookie.expires":            "stateManagement.cookie.expires"
    ,    "cookie.secure":            "stateManagement.cookie.secure"
    //    OLD Language options
    ,    noRoomToOpenTip:            "tips.noRoomToOpen"
    ,    togglerTip_open:            "tips.Close"    // open   = Close
    ,    togglerTip_closed:            "tips.Open"        // closed = Open
    ,    resizerTip:                    "tips.Resize"
    ,    sliderTip:                    "tips.Slide"
    }

/**
* @param {Object}    opts
*/
,    renameOptions: function (opts) {
        var map = $.layout.backwardCompatibility.map
        ,    oldData, newData, value
        ;
        for (var itemPath in map) {
            oldData    = getBranch( itemPath );
            value    = oldData.branch[ oldData.key ];
            if (value !== undefined) {
                newData = getBranch( map[itemPath], true );
                newData.branch[ newData.key ] = value;
                delete oldData.branch[ oldData.key ];
            }
        }

        /**
        * @param {string}    path
        * @param {boolean=}    [create=false]    Create path if does not exist
        */
        function getBranch (path, create) {
            var a = path.split(".") // split keys into array
            ,    c = a.length - 1
            ,    D = { branch: opts, key: a[c] } // init branch at top & set key (last item)
            ,    i = 0, k, undef;
            for (; i<c; i++) { // skip the last key (data)
                k = a[i];
                if (D.branch[ k ] == undefined) { // child-key does not exist
                    if (create) {
                        D.branch = D.branch[ k ] = {}; // create child-branch
                    }
                    else // can't go any farther
                        D.branch = {}; // branch is undefined
                }
                else
                    D.branch = D.branch[ k ]; // get child-branch
            }
            return D;
        };
    }

/**
* @param {Object}    opts
*/
,    renameAllOptions: function (opts) {
        var ren = $.layout.backwardCompatibility.renameOptions;
        // rename root (layout) options
        ren( opts );
        // rename 'defaults' to 'panes'
        if (opts.defaults) {
            if (typeof opts.panes !== "object")
                opts.panes = {};
            $.extend(true, opts.panes, opts.defaults);
            delete opts.defaults;
        }
        // rename options in the the options.panes key
        if (opts.panes) ren( opts.panes );
        // rename options inside *each pane key*, eg: options.west
        $.each($.layout.config.allPanes, function (i, pane) {
            if (opts[pane]) ren( opts[pane] );
        });    
        return opts;
    }
};




/*    ============================================================
 *    BEGIN WIDGET: $( selector ).layout( {options} );
 *    ============================================================
 */
$.fn.layout = function (opts) {
    var

    // local aliases to global data
    browser    = $.layout.browser
,    _c        = $.layout.config

    // local aliases to utlity methods
,    cssW    = $.layout.cssWidth
,    cssH    = $.layout.cssHeight
,    elDims    = $.layout.getElementDimensions
,    styles    = $.layout.getElementStyles
,    evtObj    = $.layout.getEventObject
,    evtPane    = $.layout.parsePaneName

/**
 * options - populated by initOptions()
 */
,    options = $.extend(true, {}, $.layout.defaults)
,    effects    = options.effects = $.extend(true, {}, $.layout.effects)

/**
 * layout-state object
 */
,    state = {
        // generate unique ID to use for event.namespace so can unbind only events added by 'this layout'
        id:                "layout"+ $.now()    // code uses alias: sID
    ,    initialized:    false
    ,    paneResizing:    false
    ,    panesSliding:    {}
    ,    container:    {     // list all keys referenced in code to avoid compiler error msgs
            innerWidth:        0
        ,    innerHeight:    0
        ,    outerWidth:        0
        ,    outerHeight:    0
        ,    layoutWidth:    0
        ,    layoutHeight:    0
        }
    ,    north:        { childIdx: 0 }
    ,    south:        { childIdx: 0 }
    ,    east:        { childIdx: 0 }
    ,    west:        { childIdx: 0 }
    ,    center:        { childIdx: 0 }
    }

/**
 * parent/child-layout pointers
 */
//,    hasParentLayout    = false    - exists ONLY inside Instance so can be set externally
,    children = {
        north:        null
    ,    south:        null
    ,    east:        null
    ,    west:        null
    ,    center:        null
    }

/*
 * ###########################
 *  INTERNAL HELPER FUNCTIONS
 * ###########################
 */

    /**
    * Manages all internal timers
    */
,    timer = {
        data:    {}
    ,    set:    function (s, fn, ms) { timer.clear(s); timer.data[s] = setTimeout(fn, ms); }
    ,    clear:    function (s) { var t=timer.data; if (t[s]) {clearTimeout(t[s]); delete t[s];} }
    }

    /**
    * Alert or console.log a message - IF option is enabled.
    *
    * @param {(string|!Object)}    msg                Message (or debug-data) to display
    * @param {boolean=}            [popup=false]    True by default, means 'alert', false means use console.log
    * @param {boolean=}            [debug=false]    True means is a widget debugging message
    */
,    _log = function (msg, popup, debug) {
        var o = options;
        if ((o.showErrorMessages && !debug) || (debug && o.showDebugMessages))
            $.layout.msg( o.name +' / '+ msg, (popup !== false) );
        return false;
    }

    /**
    * Executes a Callback function after a trigger event, like resize, open or close
    *
    * @param {string}                evtName                    Name of the layout callback, eg "onresize_start"
    * @param {(string|boolean)=}    [pane=""]                This is passed only so we can pass the 'pane object' to the callback
    * @param {(string|boolean)=}    [skipBoundEvents=false]    True = do not run events bound to the elements - only the callbacks set in options
    */
,    _runCallbacks = function (evtName, pane, skipBoundEvents) {
        var    hasPane    = pane && isStr(pane)
        ,    s        = hasPane ? state[pane] : state
        ,    o        = hasPane ? options[pane] : options
        ,    lName    = options.name
            // names like onopen and onopen_end separate are interchangeable in options...
        ,    lng        = evtName + (evtName.match(/_/) ? "" : "_end")
        ,    shrt    = lng.match(/_end$/) ? lng.substr(0, lng.length - 4) : ""
        ,    fn        = o[lng] || o[shrt]
        ,    retVal    = "NC" // NC = No Callback
        ,    args    = []
        ,    $P
        ;
        if ( !hasPane && $.type(pane) === 'boolean' ) {
            skipBoundEvents = pane; // allow pane param to be skipped for Layout callback
            pane = "";
        }

        // first trigger the callback set in the options
        if (fn) {
            try {
                // convert function name (string) to function object
                if (isStr( fn )) {
                    if (fn.match(/,/)) {
                        // function name cannot contain a comma, 
                        // so must be a function name AND a parameter to pass
                        args = fn.split(",")
                        ,    fn = eval(args[0]);
                    }
                    else // just the name of an external function?
                        fn = eval(fn);
                }
                // execute the callback, if exists
                if ($.isFunction( fn )) {
                    if (args.length)
                        retVal = g(fn)(args[1]); // pass the argument parsed from 'list'
                    else if ( hasPane )
                        // pass data: pane-name, pane-element, pane-state, pane-options, and layout-name
                        retVal = g(fn)( pane, $Ps[pane], s, o, lName );
                    else // must be a layout/container callback - pass suitable info
                        retVal = g(fn)( Instance, s, o, lName );
                }
            }
            catch (ex) {
                _log( options.errors.callbackError.replace(/EVENT/, $.trim((pane || "") +" "+ lng)), false );
                if ($.type(ex) === 'string' && string.length)
                    _log('Exception:  '+ ex, false );
            }
        }

        // trigger additional events bound directly to the pane
        if (!skipBoundEvents && retVal !== false) {
            if ( hasPane ) { // PANE events can be bound to each pane-elements
                $P    = $Ps[pane];
                o    = options[pane];
                s    = state[pane];
                $P.triggerHandler('layoutpane'+ lng, [ pane, $P, s, o, lName ]);
                if (shrt)
                    $P.triggerHandler('layoutpane'+ shrt, [ pane, $P, s, o, lName ]);
            }
            else { // LAYOUT events can be bound to the container-element
                $N.triggerHandler('layout'+ lng, [ Instance, s, o, lName ]);
                if (shrt)
                    $N.triggerHandler('layout'+ shrt, [ Instance, s, o, lName ]);
            }
        }

        // ALWAYS resizeChildren after an onresize_end event - even during initialization
        // IGNORE onsizecontent_end event because causes child-layouts to resize TWICE
        if (hasPane && evtName === "onresize_end") // BAD: || evtName === "onsizecontent_end"
            resizeChildren(pane+"", true); // compiler hack -force string

        return retVal;

        function g (f) { return f; }; // compiler hack
    }


    /**
    * cure iframe display issues in IE & other browsers
    */
,    _fixIframe = function (pane) {
        if (browser.mozilla) return; // skip FireFox - it auto-refreshes iframes onShow
        var $P = $Ps[pane];
        // if the 'pane' is an iframe, do it
        if (state[pane].tagName === "IFRAME")
            $P.css(_c.hidden).css(_c.visible); 
        else // ditto for any iframes INSIDE the pane
            $P.find('IFRAME').css(_c.hidden).css(_c.visible);
    }

    /**
    * @param  {string}        pane        Can accept ONLY a 'pane' (east, west, etc)
    * @param  {number=}        outerSize    (optional) Can pass a width, allowing calculations BEFORE element is resized
    * @return {number}        Returns the innerHeight/Width of el by subtracting padding and borders
    */
,    cssSize = function (pane, outerSize) {
        var fn = _c[pane].dir=="horz" ? cssH : cssW;
        return fn($Ps[pane], outerSize);
    }

    /**
    * @param  {string}        pane        Can accept ONLY a 'pane' (east, west, etc)
    * @return {Object}        Returns hash of minWidth & minHeight
    */
,    cssMinDims = function (pane) {
        // minWidth/Height means CSS width/height = 1px
        var    $P    = $Ps[pane]
        ,    dir    = _c[pane].dir
        ,    d    = {
                minWidth:    1001 - cssW($P, 1000)
            ,    minHeight:    1001 - cssH($P, 1000)
            }
        ;
        if (dir === "horz") d.minSize = d.minHeight;
        if (dir === "vert") d.minSize = d.minWidth;
        return d;
    }

    // TODO: see if these methods can be made more useful...
    // TODO: *maybe* return cssW/H from these so caller can use this info

    /**
    * @param {(string|!Object)}        el
    * @param {number=}                outerWidth
    * @param {boolean=}                [autoHide=false]
    */
,    setOuterWidth = function (el, outerWidth, autoHide) {
        var $E = el, w;
        if (isStr(el)) $E = $Ps[el]; // west
        else if (!el.jquery) $E = $(el);
        w = cssW($E, outerWidth);
        $E.css({ width: w });
        if (w > 0) {
            if (autoHide && $E.data('autoHidden') && $E.innerHeight() > 0) {
                $E.show().data('autoHidden', false);
                if (!browser.mozilla) // FireFox refreshes iframes - IE does not
                    // make hidden, then visible to 'refresh' display after animation
                    $E.css(_c.hidden).css(_c.visible);
            }
        }
        else if (autoHide && !$E.data('autoHidden'))
            $E.hide().data('autoHidden', true);
    }

    /**
    * @param {(string|!Object)}        el
    * @param {number=}                outerHeight
    * @param {boolean=}                [autoHide=false]
    */
,    setOuterHeight = function (el, outerHeight, autoHide) {
        var $E = el, h;
        if (isStr(el)) $E = $Ps[el]; // west
        else if (!el.jquery) $E = $(el);
        h = cssH($E, outerHeight);
        $E.css({ height: h, visibility: "visible" }); // may have been 'hidden' by sizeContent
        if (h > 0 && $E.innerWidth() > 0) {
            if (autoHide && $E.data('autoHidden')) {
                $E.show().data('autoHidden', false);
                if (!browser.mozilla) // FireFox refreshes iframes - IE does not
                    $E.css(_c.hidden).css(_c.visible);
            }
        }
        else if (autoHide && !$E.data('autoHidden'))
            $E.hide().data('autoHidden', true);
    }


    /**
    * Converts any 'size' params to a pixel/integer size, if not already
    * If 'auto' or a decimal/percentage is passed as 'size', a pixel-size is calculated
    *
    /**
    * @param  {string}                pane
    * @param  {(string|number)=}    size
    * @param  {string=}                [dir]
    * @return {number}
    */
,    _parseSize = function (pane, size, dir) {
        if (!dir) dir = _c[pane].dir;

        if (isStr(size) && size.match(/%/))
            size = (size === '100%') ? -1 : parseInt(size, 10) / 100; // convert % to decimal

        if (size === 0)
            return 0;
        else if (size >= 1)
            return parseInt(size, 10);

        var o = options, avail = 0;
        if (dir=="horz") // north or south or center.minHeight
            avail = sC.innerHeight - ($Ps.north ? o.north.spacing_open : 0) - ($Ps.south ? o.south.spacing_open : 0);
        else if (dir=="vert") // east or west or center.minWidth
            avail = sC.innerWidth - ($Ps.west ? o.west.spacing_open : 0) - ($Ps.east ? o.east.spacing_open : 0);

        if (size === -1) // -1 == 100%
            return avail;
        else if (size > 0) // percentage, eg: .25
            return round(avail * size);
        else if (pane=="center")
            return 0;
        else { // size < 0 || size=='auto' || size==Missing || size==Invalid
            // auto-size the pane
            var    dim    = (dir === "horz" ? "height" : "width")
            ,    $P    = $Ps[pane]
            ,    $C    = dim === 'height' ? $Cs[pane] : false
            ,    vis    = $.layout.showInvisibly($P) // show pane invisibly if hidden
            ,    szP    = $P.css(dim) // SAVE current pane size
            ,    szC    = $C ? $C.css(dim) : 0 // SAVE current content size
            ;
            $P.css(dim, "auto");
            if ($C) $C.css(dim, "auto");
            size = (dim === "height") ? $P.outerHeight() : $P.outerWidth(); // MEASURE
            $P.css(dim, szP).css(vis); // RESET size & visibility
            if ($C) $C.css(dim, szC);
            return size;
        }
    }

    /**
    * Calculates current 'size' (outer-width or outer-height) of a border-pane - optionally with 'pane-spacing' added
    *
    * @param  {(string|!Object)}    pane
    * @param  {boolean=}            [inclSpace=false]
    * @return {number}                Returns EITHER Width for east/west panes OR Height for north/south panes
    */
,    getPaneSize = function (pane, inclSpace) {
        var 
            $P    = $Ps[pane]
        ,    o    = options[pane]
        ,    s    = state[pane]
        ,    oSp    = (inclSpace ? o.spacing_open : 0)
        ,    cSp    = (inclSpace ? o.spacing_closed : 0)
        ;
        if (!$P || s.isHidden)
            return 0;
        else if (s.isClosed || (s.isSliding && inclSpace))
            return cSp;
        else if (_c[pane].dir === "horz")
            return $P.outerHeight() + oSp;
        else // dir === "vert"
            return $P.outerWidth() + oSp;
    }

    /**
    * Calculate min/max pane dimensions and limits for resizing
    *
    * @param  {string}        pane
    * @param  {boolean=}    [slide=false]
    */
,    setSizeLimits = function (pane, slide) {
        if (!isInitialized()) return;
        var 
            o                = options[pane]
        ,    s                = state[pane]
        ,    c                = _c[pane]
        ,    dir                = c.dir
        ,    type            = c.sizeType.toLowerCase()
        ,    isSliding        = (slide != undefined ? slide : s.isSliding) // only open() passes 'slide' param
        ,    $P                = $Ps[pane]
        ,    paneSpacing        = o.spacing_open
        //    measure the pane on the *opposite side* from this pane
        ,    altPane            = _c.oppositeEdge[pane]
        ,    altS            = state[altPane]
        ,    $altP            = $Ps[altPane]
        ,    altPaneSize        = (!$altP || altS.isVisible===false || altS.isSliding ? 0 : (dir=="horz" ? $altP.outerHeight() : $altP.outerWidth()))
        ,    altPaneSpacing    = ((!$altP || altS.isHidden ? 0 : options[altPane][ altS.isClosed !== false ? "spacing_closed" : "spacing_open" ]) || 0)
        //    limitSize prevents this pane from 'overlapping' opposite pane
        ,    containerSize    = (dir=="horz" ? sC.innerHeight : sC.innerWidth)
        ,    minCenterDims    = cssMinDims("center")
        ,    minCenterSize    = dir=="horz" ? max(options.center.minHeight, minCenterDims.minHeight) : max(options.center.minWidth, minCenterDims.minWidth)
        //    if pane is 'sliding', then ignore center and alt-pane sizes - because 'overlays' them
        ,    limitSize        = (containerSize - paneSpacing - (isSliding ? 0 : (_parseSize("center", minCenterSize, dir) + altPaneSize + altPaneSpacing)))
        ,    minSize            = s.minSize = max( _parseSize(pane, o.minSize), cssMinDims(pane).minSize )
        ,    maxSize            = s.maxSize = min( (o.maxSize ? _parseSize(pane, o.maxSize) : 100000), limitSize )
        ,    r                = s.resizerPosition = {} // used to set resizing limits
        ,    top                = sC.inset.top
        ,    left            = sC.inset.left
        ,    W                = sC.innerWidth
        ,    H                = sC.innerHeight
        ,    rW                = o.spacing_open // subtract resizer-width to get top/left position for south/east
        ;
        switch (pane) {
            case "north":    r.min = top + minSize;
                            r.max = top + maxSize;
                            break;
            case "west":    r.min = left + minSize;
                            r.max = left + maxSize;
                            break;
            case "south":    r.min = top + H - maxSize - rW;
                            r.max = top + H - minSize - rW;
                            break;
            case "east":    r.min = left + W - maxSize - rW;
                            r.max = left + W - minSize - rW;
                            break;
        };
    }

    /**
    * Returns data for setting the size/position of center pane. Also used to set Height for east/west panes
    *
    * @return JSON  Returns a hash of all dimensions: top, bottom, left, right, (outer) width and (outer) height
    */
,    calcNewCenterPaneDims = function () {
        var d = {
            top:    getPaneSize("north", true) // true = include 'spacing' value for pane
        ,    bottom:    getPaneSize("south", true)
        ,    left:    getPaneSize("west", true)
        ,    right:    getPaneSize("east", true)
        ,    width:    0
        ,    height:    0
        };

        // NOTE: sC = state.container
        // calc center-pane outer dimensions
        d.width        = sC.innerWidth - d.left - d.right;  // outerWidth
        d.height    = sC.innerHeight - d.bottom - d.top; // outerHeight
        // add the 'container border/padding' to get final positions relative to the container
        d.top        += sC.inset.top;
        d.bottom    += sC.inset.bottom;
        d.left        += sC.inset.left;
        d.right        += sC.inset.right;

        return d;
    }


    /**
    * @param {!Object}        el
    * @param {boolean=}        [allStates=false]
    */
,    getHoverClasses = function (el, allStates) {
        var
            $El        = $(el)
        ,    type    = $El.data("layoutRole")
        ,    pane    = $El.data("layoutEdge")
        ,    o        = options[pane]
        ,    root    = o[type +"Class"]
        ,    _pane    = "-"+ pane // eg: "-west"
        ,    _open    = "-open"
        ,    _closed    = "-closed"
        ,    _slide    = "-sliding"
        ,    _hover    = "-hover " // NOTE the trailing space
        ,    _state    = $El.hasClass(root+_closed) ? _closed : _open
        ,    _alt    = _state === _closed ? _open : _closed
        ,    classes = (root+_hover) + (root+_pane+_hover) + (root+_state+_hover) + (root+_pane+_state+_hover)
        ;
        if (allStates) // when 'removing' classes, also remove alternate-state classes
            classes += (root+_alt+_hover) + (root+_pane+_alt+_hover);

        if (type=="resizer" && $El.hasClass(root+_slide))
            classes += (root+_slide+_hover) + (root+_pane+_slide+_hover);

        return $.trim(classes);
    }
,    addHover    = function (evt, el) {
        var $E = $(el || this);
        if (evt && $E.data("layoutRole") === "toggler")
            evt.stopPropagation(); // prevent triggering 'slide' on Resizer-bar
        $E.addClass( getHoverClasses($E) );
    }
,    removeHover    = function (evt, el) {
        var $E = $(el || this);
        $E.removeClass( getHoverClasses($E, true) );
    }

,    onResizerEnter    = function (evt) { // ALSO called by toggler.mouseenter
        var pane    = $(this).data("layoutEdge")
        ,    s        = state[pane]
        ;
        // ignore closed-panes and mouse moving back & forth over resizer!
        // also ignore if ANY pane is currently resizing
        if ( s.isClosed || s.isResizing || state.paneResizing ) return;

        if ($.fn.disableSelection)
            $("body").disableSelection();
        if (options.maskPanesEarly)
            showMasks( pane, { resizing: true });
    }
,    onResizerLeave    = function (evt, el) {
        var    e        = el || this // el is only passed when called by the timer
        ,    pane    = $(e).data("layoutEdge")
        ,    name    = pane +"ResizerLeave"
        ;
        timer.clear(pane+"_openSlider"); // cancel slideOpen timer, if set
        timer.clear(name); // cancel enableSelection timer - may re/set below
        // this method calls itself on a timer because it needs to allow
        // enough time for dragging to kick-in and set the isResizing flag
        // dragging has a 100ms delay set, so this delay must be >100
        if (!el) // 1st call - mouseleave event
            timer.set(name, function(){ onResizerLeave(evt, e); }, 200);
        // if user is resizing, then dragStop will enableSelection(), so can skip it here
        else if ( !state.paneResizing ) { // 2nd call - by timer
            if ($.fn.enableSelection)
                $("body").enableSelection();
            if (options.maskPanesEarly)
                hideMasks();
        }
    }

/*
 * ###########################
 *   INITIALIZATION METHODS
 * ###########################
 */

    /**
    * Initialize the layout - called automatically whenever an instance of layout is created
    *
    * @see  none - triggered onInit
    * @return  mixed    true = fully initialized | false = panes not initialized (yet) | 'cancel' = abort
    */
,    _create = function () {
        // initialize config/options
        initOptions();
        var o = options
        ,    s = state;

        // TEMP state so isInitialized returns true during init process
        s.creatingLayout = true;

        // init plugins for this layout, if there are any (eg: stateManagement)
        runPluginCallbacks( Instance, $.layout.onCreate );

        // options & state have been initialized, so now run beforeLoad callback
        // onload will CANCEL layout creation if it returns false
        if (false === _runCallbacks("onload_start"))
            return 'cancel';

        // initialize the container element
        _initContainer();

        // bind hotkey function - keyDown - if required
        initHotkeys();

        // bind window.onunload
        $(window).bind("unload."+ sID, unload);

        // init plugins for this layout, if there are any (eg: customButtons)
        runPluginCallbacks( Instance, $.layout.onLoad );

        // if layout elements are hidden, then layout WILL NOT complete initialization!
        // initLayoutElements will set initialized=true and run the onload callback IF successful
        if (o.initPanes) _initLayoutElements();

        delete s.creatingLayout;

        return state.initialized;
    }

    /**
    * Initialize the layout IF not already
    *
    * @see  All methods in Instance run this test
    * @return  boolean    true = layoutElements have been initialized | false = panes are not initialized (yet)
    */
,    isInitialized = function () {
        if (state.initialized || state.creatingLayout) return true;    // already initialized
        else return _initLayoutElements();    // try to init panes NOW
    }

    /**
    * Initialize the layout - called automatically whenever an instance of layout is created
    *
    * @see  _create() & isInitialized
    * @param {boolean=}        [retry=false]    // indicates this is a 2nd try
    * @return  An object pointer to the instance created
    */
,    _initLayoutElements = function (retry) {
        // initialize config/options
        var o = options;
        // CANNOT init panes inside a hidden container!
        if (!$N.is(":visible")) {
            // handle Chrome bug where popup window 'has no height'
            // if layout is BODY element, try again in 50ms
            // SEE: http://layout.jquery-dev.net/samples/test_popup_window.html
            if ( !retry && browser.webkit && $N[0].tagName === "BODY" )
                setTimeout(function(){ _initLayoutElements(true); }, 50);
            return false;
        }

        // a center pane is required, so make sure it exists
        if (!getPane("center").length) {
            return _log( o.errors.centerPaneMissing );
        }

        // TEMP state so isInitialized returns true during init process
        state.creatingLayout = true;

        // update Container dims
        $.extend(sC, elDims( $N, o.inset )); // passing inset means DO NOT include insetX values

        // initialize all layout elements
        initPanes();    // size & position panes - calls initHandles() - which calls initResizable()

        if (o.scrollToBookmarkOnLoad) {
            var l = self.location;
            if (l.hash) l.replace( l.hash ); // scrollTo Bookmark
        }

        // check to see if this layout 'nested' inside a pane
        if (Instance.hasParentLayout)
            o.resizeWithWindow = false;
        // bind resizeAll() for 'this layout instance' to window.resize event
        else if (o.resizeWithWindow)
            $(window).bind("resize."+ sID, windowResize);

        delete state.creatingLayout;
        state.initialized = true;

        // init plugins for this layout, if there are any
        runPluginCallbacks( Instance, $.layout.onReady );

        // now run the onload callback, if exists
        _runCallbacks("onload_end");

        return true; // elements initialized successfully
    }

    /**
    * Initialize nested layouts for a specific pane - can optionally pass layout-options
    *
    * @param {(string|Object)}    evt_or_pane    The pane being opened, ie: north, south, east, or west
    * @param {Object=}            [opts]        Layout-options - if passed, will OVERRRIDE options[pane].children
    * @return  An object pointer to the layout instance created - or null
    */
,    createChildren = function (evt_or_pane, opts) {
        var    pane = evtPane.call(this, evt_or_pane)
        ,    $P    = $Ps[pane]
        ;
        if (!$P) return;
        var    $C    = $Cs[pane]
        ,    s    = state[pane]
        ,    o    = options[pane]
        ,    sm    = options.stateManagement || {}
        ,    cos = opts ? (o.children = opts) : o.children
        ;
        if ( $.isPlainObject( cos ) )
            cos = [ cos ]; // convert a hash to a 1-elem array
        else if (!cos || !$.isArray( cos ))
            return;

        $.each( cos, function (idx, co) {
            if ( !$.isPlainObject( co ) ) return;

            // determine which element is supposed to be the 'child container'
            // if pane has a 'containerSelector' OR a 'content-div', use those instead of the pane
            var $containers = co.containerSelector ? $P.find( co.containerSelector ) : ($C || $P);

            $containers.each(function(){
                var $cont    = $(this)
                ,    child    = $cont.data("layout") //    see if a child-layout ALREADY exists on this element
                ;
                // if no layout exists, but children are set, try to create the layout now
                if (!child) {
                    // TODO: see about moving this to the stateManagement plugin, as a method
                    // set a unique child-instance key for this layout, if not already set
                    setInstanceKey({ container: $cont, options: co }, s );
                    // If THIS layout has a hash in stateManagement.autoLoad,
                    // then see if it also contains state-data for this child-layout
                    // If so, copy the stateData to child.options.stateManagement.autoLoad
                    if ( sm.includeChildren && state.stateData[pane] ) {
                        //    THIS layout's state was cached when its state was loaded
                        var    paneChildren = state.stateData[pane].children || {}
                        ,    childState    = paneChildren[ co.instanceKey ]
                        ,    co_sm        = co.stateManagement || (co.stateManagement = { autoLoad: true })
                        ;
                        // COPY the stateData into the autoLoad key
                        if ( co_sm.autoLoad === true && childState ) {
                            co_sm.autoSave            = false; // disable autoSave because saving handled by parent-layout
                            co_sm.includeChildren    = true;  // cascade option - FOR NOW
                            co_sm.autoLoad = $.extend(true, {}, childState); // COPY the state-hash
                        }
                    }

                    // create the layout
                    child = $cont.layout( co );

                    // if successful, update data
                    if (child) {
                        // add the child and update all layout-pointers
                        // MAY have already been done by child-layout calling parent.refreshChildren()
                        refreshChildren( pane, child );
                    }
                }
            });
        });
    }

,    setInstanceKey = function (child, parentPaneState) {
        // create a named key for use in state and instance branches
        var    $c    = child.container
        ,    o    = child.options
        ,    sm    = o.stateManagement
        ,    key    = o.instanceKey || $c.data("layoutInstanceKey")
        ;
        if (!key) key = (sm && sm.cookie ? sm.cookie.name : '') || o.name; // look for a name/key
        if (!key) key = "layout"+ (++parentPaneState.childIdx);    // if no name/key found, generate one
        else key = key.replace(/[^\w-]/gi, '_').replace(/_{2,}/g, '_');     // ensure is valid as a hash key
        o.instanceKey = key;
        $c.data("layoutInstanceKey", key); // useful if layout is destroyed and then recreated
        return key;
    }

    /**
    * @param {string}        pane        The pane being opened, ie: north, south, east, or west
    * @param {Object=}        newChild    New child-layout Instance to add to this pane
    */
,    refreshChildren = function (pane, newChild) {
        var    $P    = $Ps[pane]
        ,    pC    = children[pane]
        ,    s    = state[pane]
        ,    o
        ;
        // check for destroy()ed layouts and update the child pointers & arrays
        if ($.isPlainObject( pC )) {
            $.each( pC, function (key, child) {
                if (child.destroyed) delete pC[key]
            });
            // if no more children, remove the children hash
            if ($.isEmptyObject( pC ))
                pC = children[pane] = null; // clear children hash
        }

        // see if there is a directly-nested layout inside this pane
        // if there is, then there can be only ONE child-layout, so check that...
        if (!newChild && !pC) {
            newChild = $P.data("layout");
        }

        // if a newChild instance was passed, add it to children[pane]
        if (newChild) {
            // update child.state
            newChild.hasParentLayout = true; // set parent-flag in child
            // instanceKey is a key-name used in both state and children
            o = newChild.options;
            // set a unique child-instance key for this layout, if not already set
            setInstanceKey( newChild, s );
            // add pointer to pane.children hash
            if (!pC) pC = children[pane] = {}; // create an empty children hash
            pC[ o.instanceKey ] = newChild.container.data("layout"); // add childLayout instance
        }

        // ALWAYS refresh the pane.children alias, even if null
        Instance[pane].children = children[pane];

        // if newChild was NOT passed - see if there is a child layout NOW
        if (!newChild) {
            createChildren(pane); // MAY create a child and re-call this method
        }
    }

,    windowResize = function () {
        var    o = options
        ,    delay = Number(o.resizeWithWindowDelay);
        if (delay < 10) delay = 100; // MUST have a delay!
        // resizing uses a delay-loop because the resize event fires repeatly - except in FF, but delay anyway
        timer.clear("winResize"); // if already running
        timer.set("winResize", function(){
            timer.clear("winResize");
            timer.clear("winResizeRepeater");
            var dims = elDims( $N, o.inset );
            // only trigger resizeAll() if container has changed size
            if (dims.innerWidth !== sC.innerWidth || dims.innerHeight !== sC.innerHeight)
                resizeAll();
        }, delay);
        // ALSO set fixed-delay timer, if not already running
        if (!timer.data["winResizeRepeater"]) setWindowResizeRepeater();
    }

,    setWindowResizeRepeater = function () {
        var delay = Number(options.resizeWithWindowMaxDelay);
        if (delay > 0)
            timer.set("winResizeRepeater", function(){ setWindowResizeRepeater(); resizeAll(); }, delay);
    }

,    unload = function () {
        var o = options;

        _runCallbacks("onunload_start");

        // trigger plugin callabacks for this layout (eg: stateManagement)
        runPluginCallbacks( Instance, $.layout.onUnload );

        _runCallbacks("onunload_end");
    }

    /**
    * Validate and initialize container CSS and events
    *
    * @see  _create()
    */
,    _initContainer = function () {
        var
            N        = $N[0]    
        ,    $H        = $("html")
        ,    tag        = sC.tagName = N.tagName
        ,    id        = sC.id = N.id
        ,    cls        = sC.className = N.className
        ,    o        = options
        ,    name    = o.name
        ,    props    = "position,margin,padding,border"
        ,    css        = "layoutCSS"
        ,    CSS        = {}
        ,    hid        = "hidden" // used A LOT!
        //    see if this container is a 'pane' inside an outer-layout
        ,    parent    = $N.data("parentLayout")    // parent-layout Instance
        ,    pane    = $N.data("layoutEdge")        // pane-name in parent-layout
        ,    isChild    = parent && pane
        ,    num        = $.layout.cssNum
        ,    $parent, n
        ;
        // sC = state.container
        sC.selector = $N.selector.split(".slice")[0];
        sC.ref        = (o.name ? o.name +' layout / ' : '') + tag + (id ? "#"+id : cls ? '.['+cls+']' : ''); // used in messages
        sC.isBody    = (tag === "BODY");

        // try to find a parent-layout
        if (!isChild && !sC.isBody) {
            $parent = $N.closest("."+ $.layout.defaults.panes.paneClass);
            parent    = $parent.data("parentLayout");
            pane    = $parent.data("layoutEdge");
            isChild    = parent && pane;
        }

        $N    .data({
                layout: Instance
            ,    layoutContainer: sID // FLAG to indicate this is a layout-container - contains unique internal ID
            })
            .addClass(o.containerClass)
        ;
        var layoutMethods = {
            destroy:    ''
        ,    initPanes:    ''
        ,    resizeAll:    'resizeAll'
        ,    resize:        'resizeAll'
        };
        // loop hash and bind all methods - include layoutID namespacing
        for (name in layoutMethods) {
            $N.bind("layout"+ name.toLowerCase() +"."+ sID, Instance[ layoutMethods[name] || name ]);
        }

        // if this container is another layout's 'pane', then set child/parent pointers
        if (isChild) {
            // update parent flag
            Instance.hasParentLayout = true;
            // set pointers to THIS child-layout (Instance) in parent-layout
            parent.refreshChildren( pane, Instance );
        }

        // SAVE original container CSS for use in destroy()
        if (!$N.data(css)) {
            // handle props like overflow different for BODY & HTML - has 'system default' values
            if (sC.isBody) {
                // SAVE <BODY> CSS
                $N.data(css, $.extend( styles($N, props), {
                    height:        $N.css("height")
                ,    overflow:    $N.css("overflow")
                ,    overflowX:    $N.css("overflowX")
                ,    overflowY:    $N.css("overflowY")
                }));
                // ALSO SAVE <HTML> CSS
                $H.data(css, $.extend( styles($H, 'padding'), {
                    height:        "auto" // FF would return a fixed px-size!
                ,    overflow:    $H.css("overflow")
                ,    overflowX:    $H.css("overflowX")
                ,    overflowY:    $H.css("overflowY")
                }));
            }
            else // handle props normally for non-body elements
                $N.data(css, styles($N, props+",top,bottom,left,right,width,height,overflow,overflowX,overflowY") );
        }

        try {
            // common container CSS
            CSS = {
                overflow:    hid
            ,    overflowX:    hid
            ,    overflowY:    hid
            };
            $N.css( CSS );

            if (o.inset && !$.isPlainObject(o.inset)) {
                // can specify a single number for equal outset all-around
                n = parseInt(o.inset, 10) || 0
                o.inset = {
                    top:    n
                ,    bottom:    n
                ,    left:    n
                ,    right:    n
                };
            }

            // format html & body if this is a full page layout
            if (sC.isBody) {
                // if HTML has padding, use this as an outer-spacing around BODY
                if (!o.outset) {
                    // use padding from parent-elem (HTML) as outset
                    o.outset = {
                        top:    num($H, "paddingTop")
                    ,    bottom:    num($H, "paddingBottom")
                    ,    left:    num($H, "paddingLeft")
                    ,    right:    num($H, "paddingRight")
                    };
                }
                else if (!$.isPlainObject(o.outset)) {
                    // can specify a single number for equal outset all-around
                    n = parseInt(o.outset, 10) || 0
                    o.outset = {
                        top:    n
                    ,    bottom:    n
                    ,    left:    n
                    ,    right:    n
                    };
                }
                // HTML
                $H.css( CSS ).css({
                    height:        "100%"
                ,    border:        "none"    // no border or padding allowed when using height = 100%
                ,    padding:    0        // ditto
                ,    margin:        0
                });
                // BODY
                if (browser.isIE6) {
                    // IE6 CANNOT use the trick of setting absolute positioning on all 4 sides - must have 'height'
                    $N.css({
                        width:        "100%"
                    ,    height:        "100%"
                    ,    border:        "none"    // no border or padding allowed when using height = 100%
                    ,    padding:    0        // ditto
                    ,    margin:        0
                    ,    position:    "relative"
                    });
                    // convert body padding to an inset option - the border cannot be measured in IE6!
                    if (!o.inset) o.inset = elDims( $N ).inset;
                }
                else { // use absolute positioning for BODY to allow borders & padding without overflow
                    $N.css({
                        width:        "auto"
                    ,    height:        "auto"
                    ,    margin:        0
                    ,    position:    "absolute"    // allows for border and padding on BODY
                    });
                    // apply edge-positioning created above
                    $N.css( o.outset );
                }
                // set current layout-container dimensions
                $.extend(sC, elDims( $N, o.inset )); // passing inset means DO NOT include insetX values
            }
            else {
                // container MUST have 'position'
                var    p = $N.css("position");
                if (!p || !p.match(/(fixed|absolute|relative)/))
                    $N.css("position","relative");

                // set current layout-container dimensions
                if ( $N.is(":visible") ) {
                    $.extend(sC, elDims( $N, o.inset )); // passing inset means DO NOT change insetX (padding) values
                    if (sC.innerHeight < 1) // container has no 'height' - warn developer
                        _log( o.errors.noContainerHeight.replace(/CONTAINER/, sC.ref) );
                }
            }

            // if container has min-width/height, then enable scrollbar(s)
            if ( num($N, "minWidth")  ) $N.parent().css("overflowX","auto");
            if ( num($N, "minHeight") ) $N.parent().css("overflowY","auto");

        } catch (ex) {}
    }

    /**
    * Bind layout hotkeys - if options enabled
    *
    * @see  _create() and addPane()
    * @param {string=}    [panes=""]    The edge(s) to process
    */
,    initHotkeys = function (panes) {
        panes = panes ? panes.split(",") : _c.borderPanes;
        // bind keyDown to capture hotkeys, if option enabled for ANY pane
        $.each(panes, function (i, pane) {
            var o = options[pane];
            if (o.enableCursorHotkey || o.customHotkey) {
                $(document).bind("keydown."+ sID, keyDown); // only need to bind this ONCE
                return false; // BREAK - binding was done
            }
        });
    }

    /**
    * Build final OPTIONS data
    *
    * @see  _create()
    */
,    initOptions = function () {
        var data, d, pane, key, val, i, c, o;

        // reprocess user's layout-options to have correct options sub-key structure
        opts = $.layout.transformData( opts, true ); // panes = default subkey

        // auto-rename old options for backward compatibility
        opts = $.layout.backwardCompatibility.renameAllOptions( opts );

        // if user-options has 'panes' key (pane-defaults), clean it...
        if (!$.isEmptyObject(opts.panes)) {
            // REMOVE any pane-defaults that MUST be set per-pane
            data = $.layout.optionsMap.noDefault;
            for (i=0, c=data.length; i<c; i++) {
                key = data[i];
                delete opts.panes[key]; // OK if does not exist
            }
            // REMOVE any layout-options specified under opts.panes
            data = $.layout.optionsMap.layout;
            for (i=0, c=data.length; i<c; i++) {
                key = data[i];
                delete opts.panes[key]; // OK if does not exist
            }
        }

        // MOVE any NON-layout-options from opts-root to opts.panes
        data = $.layout.optionsMap.layout;
        var rootKeys = $.layout.config.optionRootKeys;
        for (key in opts) {
            val = opts[key];
            if ($.inArray(key, rootKeys) < 0 && $.inArray(key, data) < 0) {
                if (!opts.panes[key])
                    opts.panes[key] = $.isPlainObject(val) ? $.extend(true, {}, val) : val;
                delete opts[key]
            }
        }

        // START by updating ALL options from opts
        $.extend(true, options, opts);

        // CREATE final options (and config) for EACH pane
        $.each(_c.allPanes, function (i, pane) {

            // apply 'pane-defaults' to CONFIG.[PANE]
            _c[pane] = $.extend(true, {}, _c.panes, _c[pane]);

            d = options.panes;
            o = options[pane];

            // center-pane uses SOME keys in defaults.panes branch
            if (pane === 'center') {
                // ONLY copy keys from opts.panes listed in: $.layout.optionsMap.center
                data = $.layout.optionsMap.center;        // list of 'center-pane keys'
                for (i=0, c=data.length; i<c; i++) {    // loop the list...
                    key = data[i];
                    // only need to use pane-default if pane-specific value not set
                    if (!opts.center[key] && (opts.panes[key] || !o[key]))
                        o[key] = d[key]; // pane-default
                }
            }
            else {
                // border-panes use ALL keys in defaults.panes branch
                o = options[pane] = $.extend(true, {}, d, o); // re-apply pane-specific opts AFTER pane-defaults
                createFxOptions( pane );
                // ensure all border-pane-specific base-classes exist
                if (!o.resizerClass)    o.resizerClass    = "ui-layout-resizer";
                if (!o.togglerClass)    o.togglerClass    = "ui-layout-toggler";
            }
            // ensure we have base pane-class (ALL panes)
            if (!o.paneClass) o.paneClass = "ui-layout-pane";
        });

        // update options.zIndexes if a zIndex-option specified
        var zo    = opts.zIndex
        ,    z    = options.zIndexes;
        if (zo > 0) {
            z.pane_normal        = zo;
            z.content_mask        = max(zo+1, z.content_mask);    // MIN = +1
            z.resizer_normal    = max(zo+2, z.resizer_normal);    // MIN = +2
        }

        // DELETE 'panes' key now that we are done - values were copied to EACH pane
        delete options.panes;


        function createFxOptions ( pane ) {
            var    o = options[pane]
            ,    d = options.panes;
            // ensure fxSettings key to avoid errors
            if (!o.fxSettings) o.fxSettings = {};
            if (!d.fxSettings) d.fxSettings = {};

            $.each(["_open","_close","_size"], function (i,n) { 
                var
                    sName        = "fxName"+ n
                ,    sSpeed        = "fxSpeed"+ n
                ,    sSettings    = "fxSettings"+ n
                    // recalculate fxName according to specificity rules
                ,    fxName = o[sName] =
                        o[sName]    // options.west.fxName_open
                    ||    d[sName]    // options.panes.fxName_open
                    ||    o.fxName    // options.west.fxName
                    ||    d.fxName    // options.panes.fxName
                    ||    "none"        // MEANS $.layout.defaults.panes.fxName == "" || false || null || 0
                ,    fxExists    = $.effects && ($.effects[fxName] || ($.effects.effect && $.effects.effect[fxName]))
                ;
                // validate fxName to ensure is valid effect - MUST have effect-config data in options.effects
                if (fxName === "none" || !options.effects[fxName] || !fxExists)
                    fxName = o[sName] = "none"; // effect not loaded OR unrecognized fxName

                // set vars for effects subkeys to simplify logic
                var    fx        = options.effects[fxName] || {}    // effects.slide
                ,    fx_all    = fx.all    || null                // effects.slide.all
                ,    fx_pane    = fx[pane]    || null                // effects.slide.west
                ;
                // create fxSpeed[_open|_close|_size]
                o[sSpeed] =
                    o[sSpeed]                // options.west.fxSpeed_open
                ||    d[sSpeed]                // options.west.fxSpeed_open
                ||    o.fxSpeed                // options.west.fxSpeed
                ||    d.fxSpeed                // options.panes.fxSpeed
                ||    null                    // DEFAULT - let fxSetting.duration control speed
                ;
                // create fxSettings[_open|_close|_size]
                o[sSettings] = $.extend(
                    true
                ,    {}
                ,    fx_all                    // effects.slide.all
                ,    fx_pane                    // effects.slide.west
                ,    d.fxSettings            // options.panes.fxSettings
                ,    o.fxSettings            // options.west.fxSettings
                ,    d[sSettings]            // options.panes.fxSettings_open
                ,    o[sSettings]            // options.west.fxSettings_open
                );
            });

            // DONE creating action-specific-settings for this pane,
            // so DELETE generic options - are no longer meaningful
            delete o.fxName;
            delete o.fxSpeed;
            delete o.fxSettings;
        }
    }

    /**
    * Initialize module objects, styling, size and position for all panes
    *
    * @see  _initElements()
    * @param {string}    pane        The pane to process
    */
,    getPane = function (pane) {
        var sel = options[pane].paneSelector
        if (sel.substr(0,1)==="#") // ID selector
            // NOTE: elements selected 'by ID' DO NOT have to be 'children'
            return $N.find(sel).eq(0);
        else { // class or other selector
            var $P = $N.children(sel).eq(0);
            // look for the pane nested inside a 'form' element
            return $P.length ? $P : $N.children("form:first").children(sel).eq(0);
        }
    }

    /**
    * @param {Object=}        evt
    */
,    initPanes = function (evt) {
        // stopPropagation if called by trigger("layoutinitpanes") - use evtPane utility 
        evtPane(evt);

        // NOTE: do north & south FIRST so we can measure their height - do center LAST
        $.each(_c.allPanes, function (idx, pane) {
            addPane( pane, true );
        });

        // init the pane-handles NOW in case we have to hide or close the pane below
        initHandles();

        // now that all panes have been initialized and initially-sized,
        // make sure there is really enough space available for each pane
        $.each(_c.borderPanes, function (i, pane) {
            if ($Ps[pane] && state[pane].isVisible) { // pane is OPEN
                setSizeLimits(pane);
                makePaneFit(pane); // pane may be Closed, Hidden or Resized by makePaneFit()
            }
        });
        // size center-pane AGAIN in case we 'closed' a border-pane in loop above
        sizeMidPanes("center");

        //    Chrome/Webkit sometimes fires callbacks BEFORE it completes resizing!
        //    Before RC30.3, there was a 10ms delay here, but that caused layout 
        //    to load asynchrously, which is BAD, so try skipping delay for now

        // process pane contents and callbacks, and init/resize child-layout if exists
        $.each(_c.allPanes, function (idx, pane) {
            afterInitPane(pane);
        });
    }

    /**
    * Add a pane to the layout - subroutine of initPanes()
    *
    * @see  initPanes()
    * @param {string}    pane            The pane to process
    * @param {boolean=}    [force=false]    Size content after init
    */
,    addPane = function (pane, force) {
        if (!force && !isInitialized()) return;
        var
            o        = options[pane]
        ,    s        = state[pane]
        ,    c        = _c[pane]
        ,    dir        = c.dir
        ,    fx        = s.fx
        ,    spacing    = o.spacing_open || 0
        ,    isCenter = (pane === "center")
        ,    CSS        = {}
        ,    $P        = $Ps[pane]
        ,    size, minSize, maxSize, child
        ;
        // if pane-pointer already exists, remove the old one first
        if ($P)
            removePane( pane, false, true, false );
        else
            $Cs[pane] = false; // init

        $P = $Ps[pane] = getPane(pane);
        if (!$P.length) {
            $Ps[pane] = false; // logic
            return;
        }

        // SAVE original Pane CSS
        if (!$P.data("layoutCSS")) {
            var props = "position,top,left,bottom,right,width,height,overflow,zIndex,display,backgroundColor,padding,margin,border";
            $P.data("layoutCSS", styles($P, props));
        }

        // create alias for pane data in Instance - initHandles will add more
        Instance[pane] = {
            name:        pane
        ,    pane:        $Ps[pane]
        ,    content:    $Cs[pane]
        ,    options:    options[pane]
        ,    state:        state[pane]
        ,    children:    children[pane]
        };

        // add classes, attributes & events
        $P    .data({
                parentLayout:    Instance        // pointer to Layout Instance
            ,    layoutPane:        Instance[pane]    // NEW pointer to pane-alias-object
            ,    layoutEdge:        pane
            ,    layoutRole:        "pane"
            })
            .css(c.cssReq).css("zIndex", options.zIndexes.pane_normal)
            .css(o.applyDemoStyles ? c.cssDemo : {}) // demo styles
            .addClass( o.paneClass +" "+ o.paneClass+"-"+pane ) // default = "ui-layout-pane ui-layout-pane-west" - may be a dupe of 'paneSelector'
            .bind("mouseenter."+ sID, addHover )
            .bind("mouseleave."+ sID, removeHover )
            ;
        var paneMethods = {
                hide:                ''
            ,    show:                ''
            ,    toggle:                ''
            ,    close:                ''
            ,    open:                ''
            ,    slideOpen:            ''
            ,    slideClose:            ''
            ,    slideToggle:        ''
            ,    size:                'sizePane'
            ,    sizePane:            'sizePane'
            ,    sizeContent:        ''
            ,    sizeHandles:        ''
            ,    enableClosable:        ''
            ,    disableClosable:    ''
            ,    enableSlideable:    ''
            ,    disableSlideable:    ''
            ,    enableResizable:    ''
            ,    disableResizable:    ''
            ,    swapPanes:            'swapPanes'
            ,    swap:                'swapPanes'
            ,    move:                'swapPanes'
            ,    removePane:            'removePane'
            ,    remove:                'removePane'
            ,    createChildren:        ''
            ,    resizeChildren:        ''
            ,    resizeAll:            'resizeAll'
            ,    resizeLayout:        'resizeAll'
            }
        ,    name;
        // loop hash and bind all methods - include layoutID namespacing
        for (name in paneMethods) {
            $P.bind("layoutpane"+ name.toLowerCase() +"."+ sID, Instance[ paneMethods[name] || name ]);
        }

        // see if this pane has a 'scrolling-content element'
        initContent(pane, false); // false = do NOT sizeContent() - called later

        if (!isCenter) {
            // call _parseSize AFTER applying pane classes & styles - but before making visible (if hidden)
            // if o.size is auto or not valid, then MEASURE the pane and use that as its 'size'
            size    = s.size = _parseSize(pane, o.size);
            minSize    = _parseSize(pane,o.minSize) || 1;
            maxSize    = _parseSize(pane,o.maxSize) || 100000;
            if (size > 0) size = max(min(size, maxSize), minSize);
            s.autoResize = o.autoResize; // used with percentage sizes

            // state for border-panes
            s.isClosed  = false; // true = pane is closed
            s.isSliding = false; // true = pane is currently open by 'sliding' over adjacent panes
            s.isResizing= false; // true = pane is in process of being resized
            s.isHidden    = false; // true = pane is hidden - no spacing, resizer or toggler is visible!

            // array for 'pin buttons' whose classNames are auto-updated on pane-open/-close
            if (!s.pins) s.pins = [];
        }
        //    states common to ALL panes
        s.tagName    = $P[0].tagName;
        s.edge        = pane;        // useful if pane is (or about to be) 'swapped' - easy find out where it is (or is going)
        s.noRoom    = false;    // true = pane 'automatically' hidden due to insufficient room - will unhide automatically
        s.isVisible    = true;        // false = pane is invisible - closed OR hidden - simplify logic

        // init pane positioning
        setPanePosition( pane );

        // if pane is not visible, 
        if (dir === "horz") // north or south pane
            CSS.height = cssH($P, size);
        else if (dir === "vert") // east or west pane
            CSS.width = cssW($P, size);
        //else if (isCenter) {}

        $P.css(CSS); // apply size -- top, bottom & height will be set by sizeMidPanes
        if (dir != "horz") sizeMidPanes(pane, true); // true = skipCallback

        // if manually adding a pane AFTER layout initialization, then...
        if (state.initialized) {
            initHandles( pane );
            initHotkeys( pane );
        }

        // close or hide the pane if specified in settings
        if (o.initClosed && o.closable && !o.initHidden)
            close(pane, true, true); // true, true = force, noAnimation
        else if (o.initHidden || o.initClosed)
            hide(pane); // will be completely invisible - no resizer or spacing
        else if (!s.noRoom)
            // make the pane visible - in case was initially hidden
            $P.css("display","block");
        // ELSE setAsOpen() - called later by initHandles()

        // RESET visibility now - pane will appear IF display:block
        $P.css("visibility","visible");

        // check option for auto-handling of pop-ups & drop-downs
        if (o.showOverflowOnHover)
            $P.hover( allowOverflow, resetOverflow );

        // if manually adding a pane AFTER layout initialization, then...
        if (state.initialized) {
            afterInitPane( pane );
        }
    }

,    afterInitPane = function (pane) {
        var    $P    = $Ps[pane]
        ,    s    = state[pane]
        ,    o    = options[pane]
        ;
        if (!$P) return;

        // see if there is a directly-nested layout inside this pane
        if ($P.data("layout"))
            refreshChildren( pane, $P.data("layout") );

        // process pane contents and callbacks, and init/resize child-layout if exists
        if (s.isVisible) { // pane is OPEN
            if (state.initialized) // this pane was added AFTER layout was created
                resizeAll(); // will also sizeContent
            else
                sizeContent(pane);

            if (o.triggerEventsOnLoad)
                _runCallbacks("onresize_end", pane);
            else // automatic if onresize called, otherwise call it specifically
                // resize child - IF inner-layout already exists (created before this layout)
                resizeChildren(pane, true); // a previously existing childLayout
        }

        // init childLayouts - even if pane is not visible
        if (o.initChildren && o.children)
            createChildren(pane);
    }

    /**
    * @param {string=}    panes        The pane(s) to process
    */
,    setPanePosition = function (panes) {
        panes = panes ? panes.split(",") : _c.borderPanes;

        // create toggler DIVs for each pane, and set object pointers for them, eg: $R.north = north toggler DIV
        $.each(panes, function (i, pane) {
            var $P    = $Ps[pane]
            ,    $R    = $Rs[pane]
            ,    o    = options[pane]
            ,    s    = state[pane]
            ,    side =  _c[pane].side
            ,    CSS    = {}
            ;
            if (!$P) return; // pane does not exist - skip

            // set css-position to account for container borders & padding
            switch (pane) {
                case "north":     CSS.top     = sC.inset.top;
                                CSS.left     = sC.inset.left;
                                CSS.right    = sC.inset.right;
                                break;
                case "south":     CSS.bottom    = sC.inset.bottom;
                                CSS.left     = sC.inset.left;
                                CSS.right     = sC.inset.right;
                                break;
                case "west":     CSS.left     = sC.inset.left; // top, bottom & height set by sizeMidPanes()
                                break;
                case "east":     CSS.right     = sC.inset.right; // ditto
                                break;
                case "center":    // top, left, width & height set by sizeMidPanes()
            }
            // apply position
            $P.css(CSS); 

            // update resizer position
            if ($R && s.isClosed)
                $R.css(side, sC.inset[side]);
            else if ($R && !s.isHidden)
                $R.css(side, sC.inset[side] + getPaneSize(pane));
        });
    }

    /**
    * Initialize module objects, styling, size and position for all resize bars and toggler buttons
    *
    * @see  _create()
    * @param {string=}    [panes=""]    The edge(s) to process
    */
,    initHandles = function (panes) {
        panes = panes ? panes.split(",") : _c.borderPanes;

        // create toggler DIVs for each pane, and set object pointers for them, eg: $R.north = north toggler DIV
        $.each(panes, function (i, pane) {
            var $P        = $Ps[pane];
            $Rs[pane]    = false; // INIT
            $Ts[pane]    = false;
            if (!$P) return; // pane does not exist - skip

            var    o        = options[pane]
            ,    s        = state[pane]
            ,    c        = _c[pane]
            ,    paneId    = o.paneSelector.substr(0,1) === "#" ? o.paneSelector.substr(1) : ""
            ,    rClass    = o.resizerClass
            ,    tClass    = o.togglerClass
            ,    spacing    = (s.isVisible ? o.spacing_open : o.spacing_closed)
            ,    _pane    = "-"+ pane // used for classNames
            ,    _state    = (s.isVisible ? "-open" : "-closed") // used for classNames
            ,    I        = Instance[pane]
                // INIT RESIZER BAR
            ,    $R        = I.resizer = $Rs[pane] = $("<div></div>")
                // INIT TOGGLER BUTTON
            ,    $T        = I.toggler = (o.closable ? $Ts[pane] = $("<div></div>") : false)
            ;

            //if (s.isVisible && o.resizable) ... handled by initResizable
            if (!s.isVisible && o.slidable)
                $R.attr("title", o.tips.Slide).css("cursor", o.sliderCursor);

            $R    // if paneSelector is an ID, then create a matching ID for the resizer, eg: "#paneLeft" => "paneLeft-resizer"
                .attr("id", paneId ? paneId +"-resizer" : "" )
                .data({
                    parentLayout:    Instance
                ,    layoutPane:        Instance[pane]    // NEW pointer to pane-alias-object
                ,    layoutEdge:        pane
                ,    layoutRole:        "resizer"
                })
                .css(_c.resizers.cssReq).css("zIndex", options.zIndexes.resizer_normal)
                .css(o.applyDemoStyles ? _c.resizers.cssDemo : {}) // add demo styles
                .addClass(rClass +" "+ rClass+_pane)
                .hover(addHover, removeHover) // ALWAYS add hover-classes, even if resizing is not enabled - handle with CSS instead
                .hover(onResizerEnter, onResizerLeave) // ALWAYS NEED resizer.mouseleave to balance toggler.mouseenter
                .appendTo($N) // append DIV to container
            ;
            if (o.resizerDblClickToggle)
                $R.bind("dblclick."+ sID, toggle );

            if ($T) {
                $T    // if paneSelector is an ID, then create a matching ID for the resizer, eg: "#paneLeft" => "#paneLeft-toggler"
                    .attr("id", paneId ? paneId +"-toggler" : "" )
                    .data({
                        parentLayout:    Instance
                    ,    layoutPane:        Instance[pane]    // NEW pointer to pane-alias-object
                    ,    layoutEdge:        pane
                    ,    layoutRole:        "toggler"
                    })
                    .css(_c.togglers.cssReq) // add base/required styles
                    .css(o.applyDemoStyles ? _c.togglers.cssDemo : {}) // add demo styles
                    .addClass(tClass +" "+ tClass+_pane)
                    .hover(addHover, removeHover) // ALWAYS add hover-classes, even if toggling is not enabled - handle with CSS instead
                    .bind("mouseenter", onResizerEnter) // NEED toggler.mouseenter because mouseenter MAY NOT fire on resizer
                    .appendTo($R) // append SPAN to resizer DIV
                ;
                // ADD INNER-SPANS TO TOGGLER
                if (o.togglerContent_open) // ui-layout-open
                    $("<span>"+ o.togglerContent_open +"</span>")
                        .data({
                            layoutEdge:        pane
                        ,    layoutRole:        "togglerContent"
                        })
                        .data("layoutRole", "togglerContent")
                        .data("layoutEdge", pane)
                        .addClass("content content-open")
                        .css("display","none")
                        .appendTo( $T )
                        //.hover( addHover, removeHover ) // use ui-layout-toggler-west-hover .content-open instead!
                    ;
                if (o.togglerContent_closed) // ui-layout-closed
                    $("<span>"+ o.togglerContent_closed +"</span>")
                        .data({
                            layoutEdge:        pane
                        ,    layoutRole:        "togglerContent"
                        })
                        .addClass("content content-closed")
                        .css("display","none")
                        .appendTo( $T )
                        //.hover( addHover, removeHover ) // use ui-layout-toggler-west-hover .content-closed instead!
                    ;
                // ADD TOGGLER.click/.hover
                enableClosable(pane);
            }

            // add Draggable events
            initResizable(pane);

            // ADD CLASSNAMES & SLIDE-BINDINGS - eg: class="resizer resizer-west resizer-open"
            if (s.isVisible)
                setAsOpen(pane);    // onOpen will be called, but NOT onResize
            else {
                setAsClosed(pane);    // onClose will be called
                bindStartSlidingEvents(pane, true); // will enable events IF option is set
            }

        });

        // SET ALL HANDLE DIMENSIONS
        sizeHandles();
    }


    /**
    * Initialize scrolling ui-layout-content div - if exists
    *
    * @see  initPane() - or externally after an Ajax injection
    * @param {string}    pane            The pane to process
    * @param {boolean=}    [resize=true]    Size content after init
    */
,    initContent = function (pane, resize) {
        if (!isInitialized()) return;
        var 
            o    = options[pane]
        ,    sel    = o.contentSelector
        ,    I    = Instance[pane]
        ,    $P    = $Ps[pane]
        ,    $C
        ;
        if (sel) $C = I.content = $Cs[pane] = (o.findNestedContent)
            ? $P.find(sel).eq(0) // match 1-element only
            : $P.children(sel).eq(0)
        ;
        if ($C && $C.length) {
            $C.data("layoutRole", "content");
            // SAVE original Content CSS
            if (!$C.data("layoutCSS"))
                $C.data("layoutCSS", styles($C, "height"));
            $C.css( _c.content.cssReq );
            if (o.applyDemoStyles) {
                $C.css( _c.content.cssDemo ); // add padding & overflow: auto to content-div
                $P.css( _c.content.cssDemoPane ); // REMOVE padding/scrolling from pane
            }
            // ensure no vertical scrollbar on pane - will mess up measurements
            if ($P.css("overflowX").match(/(scroll|auto)/)) {
                $P.css("overflow", "hidden");
            }
            state[pane].content = {}; // init content state
            if (resize !== false) sizeContent(pane);
            // sizeContent() is called AFTER init of all elements
        }
        else
            I.content = $Cs[pane] = false;
    }


    /**
    * Add resize-bars to all panes that specify it in options
    * -dependancy: $.fn.resizable - will skip if not found
    *
    * @see  _create()
    * @param {string=}    [panes=""]    The edge(s) to process
    */
,    initResizable = function (panes) {
        var    draggingAvailable = $.layout.plugins.draggable
        ,    side // set in start()
        ;
        panes = panes ? panes.split(",") : _c.borderPanes;

        $.each(panes, function (idx, pane) {
            var o = options[pane];
            if (!draggingAvailable || !$Ps[pane] || !o.resizable) {
                o.resizable = false;
                return true; // skip to next
            }

            var s        = state[pane]
            ,    z        = options.zIndexes
            ,    c        = _c[pane]
            ,    side    = c.dir=="horz" ? "top" : "left"
            ,    $P         = $Ps[pane]
            ,    $R        = $Rs[pane]
            ,    base    = o.resizerClass
            ,    lastPos    = 0 // used when live-resizing
            ,    r, live // set in start because may change
            //    'drag' classes are applied to the ORIGINAL resizer-bar while dragging is in process
            ,    resizerClass        = base+"-drag"                // resizer-drag
            ,    resizerPaneClass    = base+"-"+pane+"-drag"        // resizer-north-drag
            //    'helper' class is applied to the CLONED resizer-bar while it is being dragged
            ,    helperClass            = base+"-dragging"            // resizer-dragging
            ,    helperPaneClass        = base+"-"+pane+"-dragging" // resizer-north-dragging
            ,    helperLimitClass    = base+"-dragging-limit"    // resizer-drag
            ,    helperPaneLimitClass = base+"-"+pane+"-dragging-limit"    // resizer-north-drag
            ,    helperClassesSet    = false                     // logic var
            ;

            if (!s.isClosed)
                $R.attr("title", o.tips.Resize)
                  .css("cursor", o.resizerCursor); // n-resize, s-resize, etc

            $R.draggable({
                containment:    $N[0] // limit resizing to layout container
            ,    axis:            (c.dir=="horz" ? "y" : "x") // limit resizing to horz or vert axis
            ,    delay:            0
            ,    distance:        1
            ,    grid:            o.resizingGrid
            //    basic format for helper - style it using class: .ui-draggable-dragging
            ,    helper:            "clone"
            ,    opacity:        o.resizerDragOpacity
            ,    addClasses:        false // avoid ui-state-disabled class when disabled
            //,    iframeFix:        o.draggableIframeFix // TODO: consider using when bug is fixed
            ,    zIndex:            z.resizer_drag

            ,    start: function (e, ui) {
                    // REFRESH options & state pointers in case we used swapPanes
                    o = options[pane];
                    s = state[pane];
                    // re-read options
                    live = o.livePaneResizing;

                    // ondrag_start callback - will CANCEL hide if returns false
                    // TODO: dragging CANNOT be cancelled like this, so see if there is a way?
                    if (false === _runCallbacks("ondrag_start", pane)) return false;

                    s.isResizing        = true; // prevent pane from closing while resizing
                    state.paneResizing    = pane; // easy to see if ANY pane is resizing
                    timer.clear(pane+"_closeSlider"); // just in case already triggered

                    // SET RESIZER LIMITS - used in drag()
                    setSizeLimits(pane); // update pane/resizer state
                    r = s.resizerPosition;
                    lastPos = ui.position[ side ]

                    $R.addClass( resizerClass +" "+ resizerPaneClass ); // add drag classes
                    helperClassesSet = false; // reset logic var - see drag()

                    // DISABLE TEXT SELECTION (probably already done by resizer.mouseOver)
                    $('body').disableSelection(); 

                    // MASK PANES CONTAINING IFRAMES, APPLETS OR OTHER TROUBLESOME ELEMENTS
                    showMasks( pane, { resizing: true });
                }

            ,    drag: function (e, ui) {
                    if (!helperClassesSet) { // can only add classes after clone has been added to the DOM
                        //$(".ui-draggable-dragging")
                        ui.helper
                            .addClass( helperClass +" "+ helperPaneClass ) // add helper classes
                            .css({ right: "auto", bottom: "auto" })    // fix dir="rtl" issue
                            .children().css("visibility","hidden")    // hide toggler inside dragged resizer-bar
                        ;
                        helperClassesSet = true;
                        // draggable bug!? RE-SET zIndex to prevent E/W resize-bar showing through N/S pane!
                        if (s.isSliding) $Ps[pane].css("zIndex", z.pane_sliding);
                    }
                    // CONTAIN RESIZER-BAR TO RESIZING LIMITS
                    var limit = 0;
                    if (ui.position[side] < r.min) {
                        ui.position[side] = r.min;
                        limit = -1;
                    }
                    else if (ui.position[side] > r.max) {
                        ui.position[side] = r.max;
                        limit = 1;
                    }
                    // ADD/REMOVE dragging-limit CLASS
                    if (limit) {
                        ui.helper.addClass( helperLimitClass +" "+ helperPaneLimitClass ); // at dragging-limit
                        window.defaultStatus = (limit>0 && pane.match(/(north|west)/)) || (limit<0 && pane.match(/(south|east)/)) ? o.tips.maxSizeWarning : o.tips.minSizeWarning;
                    }
                    else {
                        ui.helper.removeClass( helperLimitClass +" "+ helperPaneLimitClass ); // not at dragging-limit
                        window.defaultStatus = "";
                    }
                    // DYNAMICALLY RESIZE PANES IF OPTION ENABLED
                    // won't trigger unless resizer has actually moved!
                    if (live && Math.abs(ui.position[side] - lastPos) >= o.liveResizingTolerance) {
                        lastPos = ui.position[side];
                        resizePanes(e, ui, pane)
                    }
                }

            ,    stop: function (e, ui) {
                    $('body').enableSelection(); // RE-ENABLE TEXT SELECTION
                    window.defaultStatus = ""; // clear 'resizing limit' message from statusbar
                    $R.removeClass( resizerClass +" "+ resizerPaneClass ); // remove drag classes from Resizer
                    s.isResizing        = false;
                    state.paneResizing    = false; // easy to see if ANY pane is resizing
                    resizePanes(e, ui, pane, true); // true = resizingDone
                }

            });
        });

        /**
        * resizePanes
        *
        * Sub-routine called from stop() - and drag() if livePaneResizing
        *
        * @param {!Object}        evt
        * @param {!Object}        ui
        * @param {string}        pane
        * @param {boolean=}        [resizingDone=false]
        */
        var resizePanes = function (evt, ui, pane, resizingDone) {
            var    dragPos    = ui.position
            ,    c        = _c[pane]
            ,    o        = options[pane]
            ,    s        = state[pane]
            ,    resizerPos
            ;
            switch (pane) {
                case "north":    resizerPos = dragPos.top; break;
                case "west":    resizerPos = dragPos.left; break;
                case "south":    resizerPos = sC.layoutHeight - dragPos.top  - o.spacing_open; break;
                case "east":    resizerPos = sC.layoutWidth  - dragPos.left - o.spacing_open; break;
            };
            // remove container margin from resizer position to get the pane size
            var newSize = resizerPos - sC.inset[c.side];

            // Disable OR Resize Mask(s) created in drag.start
            if (!resizingDone) {
                // ensure we meet liveResizingTolerance criteria
                if (Math.abs(newSize - s.size) < o.liveResizingTolerance)
                    return; // SKIP resize this time
                // resize the pane
                manualSizePane(pane, newSize, false, true); // true = noAnimation
                sizeMasks(); // resize all visible masks
            }
            else { // resizingDone
                // ondrag_end callback
                if (false !== _runCallbacks("ondrag_end", pane))
                    manualSizePane(pane, newSize, false, true); // true = noAnimation
                hideMasks(true); // true = force hiding all masks even if one is 'sliding'
                if (s.isSliding) // RE-SHOW 'object-masks' so objects won't show through sliding pane
                    showMasks( pane, { resizing: true });
            }
        };
    }

    /**
    *    sizeMask
    *
    *    Needed to overlay a DIV over an IFRAME-pane because mask CANNOT be *inside* the pane
    *    Called when mask created, and during livePaneResizing
    */
,    sizeMask = function () {
        var $M        = $(this)
        ,    pane    = $M.data("layoutMask") // eg: "west"
        ,    s        = state[pane]
        ;
        // only masks over an IFRAME-pane need manual resizing
        if (s.tagName == "IFRAME" && s.isVisible) // no need to mask closed/hidden panes
            $M.css({
                top:    s.offsetTop
            ,    left:    s.offsetLeft
            ,    width:    s.outerWidth
            ,    height:    s.outerHeight
            });
        /* ALT Method...
        var $P = $Ps[pane];
        $M.css( $P.position() ).css({ width: $P[0].offsetWidth, height: $P[0].offsetHeight });
        */
    }
,    sizeMasks = function () {
        $Ms.each( sizeMask ); // resize all 'visible' masks
    }

    /**
    * @param {string}    pane        The pane being resized, animated or isSliding
    * @param {Object=}    [args]        (optional) Options: which masks to apply, and to which panes
    */
,    showMasks = function (pane, args) {
        var    c        = _c[pane]
        ,    panes    =  ["center"]
        ,    z        = options.zIndexes
        ,    a        = $.extend({
                        objectsOnly:    false
                    ,    animation:        false
                    ,    resizing:        true
                    ,    sliding:        state[pane].isSliding
                    },    args )
        ,    o, s
        ;
        if (a.resizing)
            panes.push( pane );
        if (a.sliding)
            panes.push( _c.oppositeEdge[pane] ); // ADD the oppositeEdge-pane

        if (c.dir === "horz") {
            panes.push("west");
            panes.push("east");
        }

        $.each(panes, function(i,p){
            s = state[p];
            o = options[p];
            if (s.isVisible && ( o.maskObjects || (!a.objectsOnly && o.maskContents) )) {
                getMasks(p).each(function(){
                    sizeMask.call(this);
                    this.style.zIndex = s.isSliding ? z.pane_sliding+1 : z.pane_normal+1
                    this.style.display = "block";
                });
            }
        });
    }

    /**
    * @param {boolean=}    force        Hide masks even if a pane is sliding
    */
,    hideMasks = function (force) {
        // ensure no pane is resizing - could be a timing issue
        if (force || !state.paneResizing) {
            $Ms.hide(); // hide ALL masks
        }
        // if ANY pane is sliding, then DO NOT remove masks from panes with maskObjects enabled
        else if (!force && !$.isEmptyObject( state.panesSliding )) {
            var    i = $Ms.length - 1
            ,    p, $M;
            for (; i >= 0; i--) {
                $M    = $Ms.eq(i);
                p    = $M.data("layoutMask");
                if (!options[p].maskObjects) {
                    $M.hide();
                }
            }
        }
    }

    /**
    * @param {string}    pane
    */
,    getMasks = function (pane) {
        var $Masks    = $([])
        ,    $M, i = 0, c = $Ms.length
        ;
        for (; i<c; i++) {
            $M = $Ms.eq(i);
            if ($M.data("layoutMask") === pane)
                $Masks = $Masks.add( $M );
        }
        if ($Masks.length)
            return $Masks;
        else
            return createMasks(pane);
    }

    /**
    * createMasks
    *
    * Generates both DIV (ALWAYS used) and IFRAME (optional) elements as masks
    * An IFRAME mask is created *under* the DIV when maskObjects=true, because a DIV cannot mask an applet
    *
    * @param {string}    pane
    */
,    createMasks = function (pane) {
        var
            $P        = $Ps[pane]
        ,    s        = state[pane]
        ,    o        = options[pane]
        ,    z        = options.zIndexes
        //,    objMask    = o.maskObjects && s.tagName != "IFRAME" // check for option
        ,    $Masks    = $([])
        ,    isIframe, el, $M, css, i
        ;
        if (!o.maskContents && !o.maskObjects) return $Masks;
        // if o.maskObjects=true, then loop TWICE to create BOTH kinds of mask, else only create a DIV
        for (i=0; i < (o.maskObjects ? 2 : 1); i++) {
            isIframe = o.maskObjects && i==0;
            el = document.createElement( isIframe ? "iframe" : "div" );
            $M = $(el).data("layoutMask", pane); // add data to relate mask to pane
            el.className = "ui-layout-mask ui-layout-mask-"+ pane; // for user styling
            css = el.style;
            // styles common to both DIVs and IFRAMES
            css.display        = "block";
            css.position    = "absolute";
            css.background    = "#FFF";
            if (isIframe) { // IFRAME-only props
                el.frameborder = 0;
                el.src        = "about:blank";
                //el.allowTransparency = true; - for IE, but breaks masking ability!
                css.opacity    = 0;
                css.filter    = "Alpha(Opacity='0')";
                css.border    = 0;
            }
            // if pane is an IFRAME, then must mask the pane itself
            if (s.tagName == "IFRAME") {
                // NOTE sizing done by a subroutine so can be called during live-resizing
                css.zIndex    = z.pane_normal+1; // 1-higher than pane
                $N.append( el ); // append to LAYOUT CONTAINER
            }
            // otherwise put masks *inside the pane* to mask its contents
            else {
                $M.addClass("ui-layout-mask-inside-pane");
                css.zIndex    = o.maskZindex || z.content_mask; // usually 1, but customizable
                css.top        = 0;
                css.left    = 0;
                css.width    = "100%";
                css.height    = "100%";
                $P.append( el ); // append INSIDE pane element
            }
            // add to return object
            $Masks = $Masks.add( el );
            // add Mask to cached array so can be resized & reused
            $Ms = $Ms.add( el );
        }
        return $Masks;
    }


    /**
    * Destroy this layout and reset all elements
    *
    * @param {boolean=}    [destroyChildren=false]        Destory Child-Layouts first?
    */
,    destroy = function (evt_or_destroyChildren, destroyChildren) {
        // UNBIND layout events and remove global object
        $(window).unbind("."+ sID);        // resize & unload
        $(document).unbind("."+ sID);    // keyDown (hotkeys)

        if (typeof evt_or_destroyChildren === "object")
            // stopPropagation if called by trigger("layoutdestroy") - use evtPane utility 
            evtPane(evt_or_destroyChildren);
        else // no event, so transfer 1st param to destroyChildren param
            destroyChildren = evt_or_destroyChildren;

        // need to look for parent layout BEFORE we remove the container data, else skips a level
        //var parentPane = Instance.hasParentLayout ? $.layout.getParentPaneInstance( $N ) : null;

        // reset layout-container
        $N    .clearQueue()
            .removeData("layout")
            .removeData("layoutContainer")
            .removeClass(options.containerClass)
            .unbind("."+ sID) // remove ALL Layout events
        ;

        // remove all mask elements that have been created
        $Ms.remove();

        // loop all panes to remove layout classes, attributes and bindings
        $.each(_c.allPanes, function (i, pane) {
            removePane( pane, false, true, destroyChildren ); // true = skipResize
        });

        // do NOT reset container CSS if is a 'pane' (or 'content') in an outer-layout - ie, THIS layout is 'nested'
        var css = "layoutCSS";
        if ($N.data(css) && !$N.data("layoutRole")) // RESET CSS
            $N.css( $N.data(css) ).removeData(css);

        // for full-page layouts, also reset the <HTML> CSS
        if (sC.tagName === "BODY" && ($N = $("html")).data(css)) // RESET <HTML> CSS
            $N.css( $N.data(css) ).removeData(css);

        // trigger plugins for this layout, if there are any
        runPluginCallbacks( Instance, $.layout.onDestroy );

        // trigger state-management and onunload callback
        unload();

        // clear the Instance of everything except for container & options (so could recreate)
        // RE-CREATE: myLayout = myLayout.container.layout( myLayout.options );
        for (var n in Instance)
            if (!n.match(/^(container|options)$/)) delete Instance[ n ];
        // add a 'destroyed' flag to make it easy to check
        Instance.destroyed = true;

        // if this is a child layout, CLEAR the child-pointer in the parent
        /* for now the pointer REMAINS, but with only container, options and destroyed keys
        if (parentPane) {
            var layout    = parentPane.pane.data("parentLayout")
            ,    key        = layout.options.instanceKey || 'error';
            // THIS SYNTAX MAY BE WRONG!
            parentPane.children[key] = layout.children[ parentPane.name ].children[key] = null;
        }
        */

        return Instance; // for coding convenience
    }

    /**
    * Remove a pane from the layout - subroutine of destroy()
    *
    * @see  destroy()
    * @param {(string|Object)}    evt_or_pane            The pane to process
    * @param {boolean=}            [remove=false]        Remove the DOM element?
    * @param {boolean=}            [skipResize=false]    Skip calling resizeAll()?
    * @param {boolean=}            [destroyChild=true]    Destroy Child-layouts? If not passed, obeys options setting
    */
,    removePane = function (evt_or_pane, remove, skipResize, destroyChild) {
        if (!isInitialized()) return;
        var    pane = evtPane.call(this, evt_or_pane)
        ,    $P    = $Ps[pane]
        ,    $C    = $Cs[pane]
        ,    $R    = $Rs[pane]
        ,    $T    = $Ts[pane]
        ;
        // NOTE: elements can still exist even after remove()
        //        so check for missing data(), which is cleared by removed()
        if ($P && $.isEmptyObject( $P.data() )) $P = false;
        if ($C && $.isEmptyObject( $C.data() )) $C = false;
        if ($R && $.isEmptyObject( $R.data() )) $R = false;
        if ($T && $.isEmptyObject( $T.data() )) $T = false;

        if ($P) $P.stop(true, true);

        var    o    = options[pane]
        ,    s    = state[pane]
        ,    d    = "layout"
        ,    css    = "layoutCSS"
        ,    pC    = children[pane]
        ,    hasChildren    = $.isPlainObject( pC ) && !$.isEmptyObject( pC )
        ,    destroy        = destroyChild !== undefined ? destroyChild : o.destroyChildren
        ;
        // FIRST destroy the child-layout(s)
        if (hasChildren && destroy) {
            $.each( pC, function (key, child) {
                if (!child.destroyed)
                    child.destroy(true);// tell child-layout to destroy ALL its child-layouts too
                if (child.destroyed)    // destroy was successful
                    delete pC[key];
            });
            // if no more children, remove the children hash
            if ($.isEmptyObject( pC )) {
                pC = children[pane] = null; // clear children hash
                hasChildren = false;
            }
        }

        // Note: can't 'remove' a pane element with non-destroyed children
        if ($P && remove && !hasChildren)
            $P.remove(); // remove the pane-element and everything inside it
        else if ($P && $P[0]) {
            //    create list of ALL pane-classes that need to be removed
            var    root    = o.paneClass // default="ui-layout-pane"
            ,    pRoot    = root +"-"+ pane // eg: "ui-layout-pane-west"
            ,    _open    = "-open"
            ,    _sliding= "-sliding"
            ,    _closed    = "-closed"
            ,    classes    = [    root, root+_open, root+_closed, root+_sliding,        // generic classes
                            pRoot, pRoot+_open, pRoot+_closed, pRoot+_sliding ]    // pane-specific classes
            ;
            $.merge(classes, getHoverClasses($P, true)); // ADD hover-classes
            // remove all Layout classes from pane-element
            $P    .removeClass( classes.join(" ") ) // remove ALL pane-classes
                .removeData("parentLayout")
                .removeData("layoutPane")
                .removeData("layoutRole")
                .removeData("layoutEdge")
                .removeData("autoHidden")    // in case set
                .unbind("."+ sID) // remove ALL Layout events
                // TODO: remove these extra unbind commands when jQuery is fixed
                //.unbind("mouseenter"+ sID)
                //.unbind("mouseleave"+ sID)
            ;
            // do NOT reset CSS if this pane/content is STILL the container of a nested layout!
            // the nested layout will reset its 'container' CSS when/if it is destroyed
            if (hasChildren && $C) {
                // a content-div may not have a specific width, so give it one to contain the Layout
                $C.width( $C.width() );
                $.each( pC, function (key, child) {
                    child.resizeAll(); // resize the Layout
                });
            }
            else if ($C)
                $C.css( $C.data(css) ).removeData(css).removeData("layoutRole");
            // remove pane AFTER content in case there was a nested layout
            if (!$P.data(d))
                $P.css( $P.data(css) ).removeData(css);
        }

        // REMOVE pane resizer and toggler elements
        if ($T) $T.remove();
        if ($R) $R.remove();

        // CLEAR all pointers and state data
        Instance[pane] = $Ps[pane] = $Cs[pane] = $Rs[pane] = $Ts[pane] = false;
        s = { removed: true };

        if (!skipResize)
            resizeAll();
    }


/*
 * ###########################
 *       ACTION METHODS
 * ###########################
 */

    /**
    * @param {string}    pane
    */
,    _hidePane = function (pane) {
        var $P    = $Ps[pane]
        ,    o    = options[pane]
        ,    s    = $P[0].style
        ;
        if (o.useOffscreenClose) {
            if (!$P.data(_c.offscreenReset))
                $P.data(_c.offscreenReset, { left: s.left, right: s.right });
            $P.css( _c.offscreenCSS );
        }
        else
            $P.hide().removeData(_c.offscreenReset);
    }

    /**
    * @param {string}    pane
    */
,    _showPane = function (pane) {
        var $P    = $Ps[pane]
        ,    o    = options[pane]
        ,    off    = _c.offscreenCSS
        ,    old    = $P.data(_c.offscreenReset)
        ,    s    = $P[0].style
        ;
        $P    .show() // ALWAYS show, just in case
            .removeData(_c.offscreenReset);
        if (o.useOffscreenClose && old) {
            if (s.left == off.left)
                s.left = old.left;
            if (s.right == off.right)
                s.right = old.right;
        }
    }


    /**
    * Completely 'hides' a pane, including its spacing - as if it does not exist
    * The pane is not actually 'removed' from the source, so can use 'show' to un-hide it
    *
    * @param {(string|Object)}    evt_or_pane            The pane being hidden, ie: north, south, east, or west
    * @param {boolean=}            [noAnimation=false]    
    */
,    hide = function (evt_or_pane, noAnimation) {
        if (!isInitialized()) return;
        var    pane = evtPane.call(this, evt_or_pane)
        ,    o    = options[pane]
        ,    s    = state[pane]
        ,    $P    = $Ps[pane]
        ,    $R    = $Rs[pane]
        ;
        if (!$P || s.isHidden) return; // pane does not exist OR is already hidden

        // onhide_start callback - will CANCEL hide if returns false
        if (state.initialized && false === _runCallbacks("onhide_start", pane)) return;

        s.isSliding = false; // just in case
        delete state.panesSliding[pane];

        // now hide the elements
        if ($R) $R.hide(); // hide resizer-bar
        if (!state.initialized || s.isClosed) {
            s.isClosed = true; // to trigger open-animation on show()
            s.isHidden  = true;
            s.isVisible = false;
            if (!state.initialized)
                _hidePane(pane); // no animation when loading page
            sizeMidPanes(_c[pane].dir === "horz" ? "" : "center");
            if (state.initialized || o.triggerEventsOnLoad)
                _runCallbacks("onhide_end", pane);
        }
        else {
            s.isHiding = true; // used by onclose
            close(pane, false, noAnimation); // adjust all panes to fit
        }
    }

    /**
    * Show a hidden pane - show as 'closed' by default unless openPane = true
    *
    * @param {(string|Object)}    evt_or_pane            The pane being opened, ie: north, south, east, or west
    * @param {boolean=}            [openPane=false]
    * @param {boolean=}            [noAnimation=false]
    * @param {boolean=}            [noAlert=false]
    */
,    show = function (evt_or_pane, openPane, noAnimation, noAlert) {
        if (!isInitialized()) return;
        var    pane = evtPane.call(this, evt_or_pane)
        ,    o    = options[pane]
        ,    s    = state[pane]
        ,    $P    = $Ps[pane]
        ,    $R    = $Rs[pane]
        ;
        if (!$P || !s.isHidden) return; // pane does not exist OR is not hidden

        // onshow_start callback - will CANCEL show if returns false
        if (false === _runCallbacks("onshow_start", pane)) return;

        s.isShowing = true; // used by onopen/onclose
        //s.isHidden  = false; - will be set by open/close - if not cancelled
        s.isSliding = false; // just in case
        delete state.panesSliding[pane];

        // now show the elements
        //if ($R) $R.show(); - will be shown by open/close
        if (openPane === false)
            close(pane, true); // true = force
        else
            open(pane, false, noAnimation, noAlert); // adjust all panes to fit
    }


    /**
    * Toggles a pane open/closed by calling either open or close
    *
    * @param {(string|Object)}    evt_or_pane        The pane being toggled, ie: north, south, east, or west
    * @param {boolean=}            [slide=false]
    */
,    toggle = function (evt_or_pane, slide) {
        if (!isInitialized()) return;
        var    evt        = evtObj(evt_or_pane)
        ,    pane    = evtPane.call(this, evt_or_pane)
        ,    s        = state[pane]
        ;
        if (evt) // called from to $R.dblclick OR triggerPaneEvent
            evt.stopImmediatePropagation();
        if (s.isHidden)
            show(pane); // will call 'open' after unhiding it
        else if (s.isClosed)
            open(pane, !!slide);
        else
            close(pane);
    }


    /**
    * Utility method used during init or other auto-processes
    *
    * @param {string}    pane   The pane being closed
    * @param {boolean=}    [setHandles=false]
    */
,    _closePane = function (pane, setHandles) {
        var
            $P    = $Ps[pane]
        ,    s    = state[pane]
        ;
        _hidePane(pane);
        s.isClosed = true;
        s.isVisible = false;
        if (setHandles) setAsClosed(pane);
    }

    /**
    * Close the specified pane (animation optional), and resize all other panes as needed
    *
    * @param {(string|Object)}    evt_or_pane            The pane being closed, ie: north, south, east, or west
    * @param {boolean=}            [force=false]
    * @param {boolean=}            [noAnimation=false]
    * @param {boolean=}            [skipCallback=false]
    */
,    close = function (evt_or_pane, force, noAnimation, skipCallback) {
        var    pane = evtPane.call(this, evt_or_pane);
        // if pane has been initialized, but NOT the complete layout, close pane instantly
        if (!state.initialized && $Ps[pane]) {
            _closePane(pane, true); // INIT pane as closed
            return;
        }
        if (!isInitialized()) return;

        var
            $P    = $Ps[pane]
        ,    $R    = $Rs[pane]
        ,    $T    = $Ts[pane]
        ,    o    = options[pane]
        ,    s    = state[pane]
        ,    c    = _c[pane]
        ,    doFX, isShowing, isHiding, wasSliding;

        // QUEUE in case another action/animation is in progress
        $N.queue(function( queueNext ){

            if ( !$P
            ||    (!o.closable && !s.isShowing && !s.isHiding)    // invalid request // (!o.resizable && !o.closable) ???
            ||    (!force && s.isClosed && !s.isShowing)            // already closed
            ) return queueNext();

            // onclose_start callback - will CANCEL hide if returns false
            // SKIP if just 'showing' a hidden pane as 'closed'
            var abort = !s.isShowing && false === _runCallbacks("onclose_start", pane);

            // transfer logic vars to temp vars
            isShowing    = s.isShowing;
            isHiding    = s.isHiding;
            wasSliding    = s.isSliding;
            // now clear the logic vars (REQUIRED before aborting)
            delete s.isShowing;
            delete s.isHiding;

            if (abort) return queueNext();

            doFX        = !noAnimation && !s.isClosed && (o.fxName_close != "none");
            s.isMoving    = true;
            s.isClosed    = true;
            s.isVisible    = false;
            // update isHidden BEFORE sizing panes
            if (isHiding) s.isHidden = true;
            else if (isShowing) s.isHidden = false;

            if (s.isSliding) // pane is being closed, so UNBIND trigger events
                bindStopSlidingEvents(pane, false); // will set isSliding=false
            else // resize panes adjacent to this one
                sizeMidPanes(_c[pane].dir === "horz" ? "" : "center", false); // false = NOT skipCallback

            // if this pane has a resizer bar, move it NOW - before animation
            setAsClosed(pane);

            // CLOSE THE PANE
            if (doFX) { // animate the close
                lockPaneForFX(pane, true);    // need to set left/top so animation will work
                $P.hide( o.fxName_close, o.fxSettings_close, o.fxSpeed_close, function () {
                    lockPaneForFX(pane, false); // undo
                    if (s.isClosed) close_2();
                    queueNext();
                });
            }
            else { // hide the pane without animation
                _hidePane(pane);
                close_2();
                queueNext();
            };
        });

        // SUBROUTINE
        function close_2 () {
            s.isMoving    = false;
            bindStartSlidingEvents(pane, true); // will enable if o.slidable = true

            // if opposite-pane was autoClosed, see if it can be autoOpened now
            var altPane = _c.oppositeEdge[pane];
            if (state[ altPane ].noRoom) {
                setSizeLimits( altPane );
                makePaneFit( altPane );
            }

            if (!skipCallback && (state.initialized || o.triggerEventsOnLoad)) {
                // onclose callback - UNLESS just 'showing' a hidden pane as 'closed'
                if (!isShowing)    _runCallbacks("onclose_end", pane);
                // onhide OR onshow callback
                if (isShowing)    _runCallbacks("onshow_end", pane);
                if (isHiding)    _runCallbacks("onhide_end", pane);
            }
        }
    }

    /**
    * @param {string}    pane    The pane just closed, ie: north, south, east, or west
    */
,    setAsClosed = function (pane) {
        if (!$Rs[pane]) return; // handles not initialized yet!
        var
            $P        = $Ps[pane]
        ,    $R        = $Rs[pane]
        ,    $T        = $Ts[pane]
        ,    o        = options[pane]
        ,    s        = state[pane]
        ,    side    = _c[pane].side
        ,    rClass    = o.resizerClass
        ,    tClass    = o.togglerClass
        ,    _pane    = "-"+ pane // used for classNames
        ,    _open    = "-open"
        ,    _sliding= "-sliding"
        ,    _closed    = "-closed"
        ;
        $R
            .css(side, sC.inset[side]) // move the resizer
            .removeClass( rClass+_open +" "+ rClass+_pane+_open )
            .removeClass( rClass+_sliding +" "+ rClass+_pane+_sliding )
            .addClass( rClass+_closed +" "+ rClass+_pane+_closed )
        ;
        // DISABLE 'resizing' when closed - do this BEFORE bindStartSlidingEvents?
        if (o.resizable && $.layout.plugins.draggable)
            $R
                .draggable("disable")
                .removeClass("ui-state-disabled") // do NOT apply disabled styling - not suitable here
                .css("cursor", "default")
                .attr("title","")
            ;

        // if pane has a toggler button, adjust that too
        if ($T) {
            $T
                .removeClass( tClass+_open +" "+ tClass+_pane+_open )
                .addClass( tClass+_closed +" "+ tClass+_pane+_closed )
                .attr("title", o.tips.Open) // may be blank
            ;
            // toggler-content - if exists
            $T.children(".content-open").hide();
            $T.children(".content-closed").css("display","block");
        }

        // sync any 'pin buttons'
        syncPinBtns(pane, false);

        if (state.initialized) {
            // resize 'length' and position togglers for adjacent panes
            sizeHandles();
        }
    }

    /**
    * Open the specified pane (animation optional), and resize all other panes as needed
    *
    * @param {(string|Object)}    evt_or_pane            The pane being opened, ie: north, south, east, or west
    * @param {boolean=}            [slide=false]
    * @param {boolean=}            [noAnimation=false]
    * @param {boolean=}            [noAlert=false]
    */
,    open = function (evt_or_pane, slide, noAnimation, noAlert) {
        if (!isInitialized()) return;
        var    pane = evtPane.call(this, evt_or_pane)
        ,    $P    = $Ps[pane]
        ,    $R    = $Rs[pane]
        ,    $T    = $Ts[pane]
        ,    o    = options[pane]
        ,    s    = state[pane]
        ,    c    = _c[pane]
        ,    doFX, isShowing
        ;
        // QUEUE in case another action/animation is in progress
        $N.queue(function( queueNext ){

            if ( !$P
            ||    (!o.resizable && !o.closable && !s.isShowing)    // invalid request
            ||    (s.isVisible && !s.isSliding)                    // already open
            ) return queueNext();

            // pane can ALSO be unhidden by just calling show(), so handle this scenario
            if (s.isHidden && !s.isShowing) {
                queueNext(); // call before show() because it needs the queue free
                show(pane, true);
                return;
            }

            if (s.autoResize && s.size != o.size) // resize pane to original size set in options
                sizePane(pane, o.size, true, true, true); // true=skipCallback/noAnimation/forceResize
            else
                // make sure there is enough space available to open the pane
                setSizeLimits(pane, slide);

            // onopen_start callback - will CANCEL open if returns false
            var cbReturn = _runCallbacks("onopen_start", pane);

            if (cbReturn === "abort")
                return queueNext();

            // update pane-state again in case options were changed in onopen_start
            if (cbReturn !== "NC") // NC = "No Callback"
                setSizeLimits(pane, slide);

            if (s.minSize > s.maxSize) { // INSUFFICIENT ROOM FOR PANE TO OPEN!
                syncPinBtns(pane, false); // make sure pin-buttons are reset
                if (!noAlert && o.tips.noRoomToOpen)
                    alert(o.tips.noRoomToOpen);
                return queueNext(); // ABORT
            }

            if (slide) // START Sliding - will set isSliding=true
                bindStopSlidingEvents(pane, true); // BIND trigger events to close sliding-pane
            else if (s.isSliding) // PIN PANE (stop sliding) - open pane 'normally' instead
                bindStopSlidingEvents(pane, false); // UNBIND trigger events - will set isSliding=false
            else if (o.slidable)
                bindStartSlidingEvents(pane, false); // UNBIND trigger events

            s.noRoom = false; // will be reset by makePaneFit if 'noRoom'
            makePaneFit(pane);

            // transfer logic var to temp var
            isShowing = s.isShowing;
            // now clear the logic var
            delete s.isShowing;

            doFX        = !noAnimation && s.isClosed && (o.fxName_open != "none");
            s.isMoving    = true;
            s.isVisible    = true;
            s.isClosed    = false;
            // update isHidden BEFORE sizing panes - WHY??? Old?
            if (isShowing) s.isHidden = false;

            if (doFX) { // ANIMATE
                // mask adjacent panes with objects
                lockPaneForFX(pane, true);    // need to set left/top so animation will work
                    $P.show( o.fxName_open, o.fxSettings_open, o.fxSpeed_open, function() {
                    lockPaneForFX(pane, false); // undo
                    if (s.isVisible) open_2(); // continue
                    queueNext();
                });
            }
            else { // no animation
                _showPane(pane);// just show pane and...
                open_2();        // continue
                queueNext();
            };
        });

        // SUBROUTINE
        function open_2 () {
            s.isMoving    = false;

            // cure iframe display issues
            _fixIframe(pane);

            // NOTE: if isSliding, then other panes are NOT 'resized'
            if (!s.isSliding) { // resize all panes adjacent to this one
                sizeMidPanes(_c[pane].dir=="vert" ? "center" : "", false); // false = NOT skipCallback
            }

            // set classes, position handles and execute callbacks...
            setAsOpen(pane);
        };
    
    }

    /**
    * @param {string}    pane        The pane just opened, ie: north, south, east, or west
    * @param {boolean=}    [skipCallback=false]
    */
,    setAsOpen = function (pane, skipCallback) {
        var 
            $P        = $Ps[pane]
        ,    $R        = $Rs[pane]
        ,    $T        = $Ts[pane]
        ,    o        = options[pane]
        ,    s        = state[pane]
        ,    side    = _c[pane].side
        ,    rClass    = o.resizerClass
        ,    tClass    = o.togglerClass
        ,    _pane    = "-"+ pane // used for classNames
        ,    _open    = "-open"
        ,    _closed    = "-closed"
        ,    _sliding= "-sliding"
        ;
        $R
            .css(side, sC.inset[side] + getPaneSize(pane)) // move the resizer
            .removeClass( rClass+_closed +" "+ rClass+_pane+_closed )
            .addClass( rClass+_open +" "+ rClass+_pane+_open )
        ;
        if (s.isSliding)
            $R.addClass( rClass+_sliding +" "+ rClass+_pane+_sliding )
        else // in case 'was sliding'
            $R.removeClass( rClass+_sliding +" "+ rClass+_pane+_sliding )

        removeHover( 0, $R ); // remove hover classes
        if (o.resizable && $.layout.plugins.draggable)
            $R    .draggable("enable")
                .css("cursor", o.resizerCursor)
                .attr("title", o.tips.Resize);
        else if (!s.isSliding)
            $R.css("cursor", "default"); // n-resize, s-resize, etc

        // if pane also has a toggler button, adjust that too
        if ($T) {
            $T    .removeClass( tClass+_closed +" "+ tClass+_pane+_closed )
                .addClass( tClass+_open +" "+ tClass+_pane+_open )
                .attr("title", o.tips.Close); // may be blank
            removeHover( 0, $T ); // remove hover classes
            // toggler-content - if exists
            $T.children(".content-closed").hide();
            $T.children(".content-open").css("display","block");
        }

        // sync any 'pin buttons'
        syncPinBtns(pane, !s.isSliding);

        // update pane-state dimensions - BEFORE resizing content
        $.extend(s, elDims($P));

        if (state.initialized) {
            // resize resizer & toggler sizes for all panes
            sizeHandles();
            // resize content every time pane opens - to be sure
            sizeContent(pane, true); // true = remeasure headers/footers, even if 'pane.isMoving'
        }

        if (!skipCallback && (state.initialized || o.triggerEventsOnLoad) && $P.is(":visible")) {
            // onopen callback
            _runCallbacks("onopen_end", pane);
            // onshow callback - TODO: should this be here?
            if (s.isShowing) _runCallbacks("onshow_end", pane);

            // ALSO call onresize because layout-size *may* have changed while pane was closed
            if (state.initialized)
                _runCallbacks("onresize_end", pane);
        }

        // TODO: Somehow sizePane("north") is being called after this point???
    }


    /**
    * slideOpen / slideClose / slideToggle
    *
    * Pass-though methods for sliding
    */
,    slideOpen = function (evt_or_pane) {
        if (!isInitialized()) return;
        var    evt        = evtObj(evt_or_pane)
        ,    pane    = evtPane.call(this, evt_or_pane)
        ,    s        = state[pane]
        ,    delay    = options[pane].slideDelay_open
        ;
        // prevent event from triggering on NEW resizer binding created below
        if (evt) evt.stopImmediatePropagation();

        if (s.isClosed && evt && evt.type === "mouseenter" && delay > 0)
            // trigger = mouseenter - use a delay
            timer.set(pane+"_openSlider", open_NOW, delay);
        else
            open_NOW(); // will unbind events if is already open

        /**
        * SUBROUTINE for timed open
        */
        function open_NOW () {
            if (!s.isClosed) // skip if no longer closed!
                bindStopSlidingEvents(pane, true); // BIND trigger events to close sliding-pane
            else if (!s.isMoving)
                open(pane, true); // true = slide - open() will handle binding
        };
    }

,    slideClose = function (evt_or_pane) {
        if (!isInitialized()) return;
        var    evt        = evtObj(evt_or_pane)
        ,    pane    = evtPane.call(this, evt_or_pane)
        ,    o        = options[pane]
        ,    s        = state[pane]
        ,    delay    = s.isMoving ? 1000 : 300 // MINIMUM delay - option may override
        ;
        if (s.isClosed || s.isResizing)
            return; // skip if already closed OR in process of resizing
        else if (o.slideTrigger_close === "click")
            close_NOW(); // close immediately onClick
        else if (o.preventQuickSlideClose && s.isMoving)
            return; // handle Chrome quick-close on slide-open
        else if (o.preventPrematureSlideClose && evt && $.layout.isMouseOverElem(evt, $Ps[pane]))
            return; // handle incorrect mouseleave trigger, like when over a SELECT-list in IE
        else if (evt) // trigger = mouseleave - use a delay
            // 1 sec delay if 'opening', else .3 sec
            timer.set(pane+"_closeSlider", close_NOW, max(o.slideDelay_close, delay));
        else // called programically
            close_NOW();

        /**
        * SUBROUTINE for timed close
        */
        function close_NOW () {
            if (s.isClosed) // skip 'close' if already closed!
                bindStopSlidingEvents(pane, false); // UNBIND trigger events - TODO: is this needed here?
            else if (!s.isMoving)
                close(pane); // close will handle unbinding
        };
    }

    /**
    * @param {(string|Object)}    evt_or_pane        The pane being opened, ie: north, south, east, or west
    */
,    slideToggle = function (evt_or_pane) {
        var pane = evtPane.call(this, evt_or_pane);
        toggle(pane, true);
    }


    /**
    * Must set left/top on East/South panes so animation will work properly
    *
    * @param {string}    pane    The pane to lock, 'east' or 'south' - any other is ignored!
    * @param {boolean}    doLock  true = set left/top, false = remove
    */
,    lockPaneForFX = function (pane, doLock) {
        var $P    = $Ps[pane]
        ,    s    = state[pane]
        ,    o    = options[pane]
        ,    z    = options.zIndexes
        ;
        if (doLock) {
            showMasks( pane, { animation: true, objectsOnly: true });
            $P.css({ zIndex: z.pane_animate }); // overlay all elements during animation
            if (pane=="south")
                $P.css({ top: sC.inset.top + sC.innerHeight - $P.outerHeight() });
            else if (pane=="east")
                $P.css({ left: sC.inset.left + sC.innerWidth - $P.outerWidth() });
        }
        else { // animation DONE - RESET CSS
            hideMasks();
            $P.css({ zIndex: (s.isSliding ? z.pane_sliding : z.pane_normal) });
            if (pane=="south")
                $P.css({ top: "auto" });
            // if pane is positioned 'off-screen', then DO NOT screw with it!
            else if (pane=="east" && !$P.css("left").match(/\-99999/))
                $P.css({ left: "auto" });
            // fix anti-aliasing in IE - only needed for animations that change opacity
            if (browser.msie && o.fxOpacityFix && o.fxName_open != "slide" && $P.css("filter") && $P.css("opacity") == 1)
                $P[0].style.removeAttribute('filter');
        }
    }


    /**
    * Toggle sliding functionality of a specific pane on/off by adding removing 'slide open' trigger
    *
    * @see  open(), close()
    * @param {string}    pane    The pane to enable/disable, 'north', 'south', etc.
    * @param {boolean}    enable    Enable or Disable sliding?
    */
,    bindStartSlidingEvents = function (pane, enable) {
        var o        = options[pane]
        ,    $P        = $Ps[pane]
        ,    $R        = $Rs[pane]
        ,    evtName    = o.slideTrigger_open.toLowerCase()
        ;
        if (!$R || (enable && !o.slidable)) return;

        // make sure we have a valid event
        if (evtName.match(/mouseover/))
            evtName = o.slideTrigger_open = "mouseenter";
        else if (!evtName.match(/(click|dblclick|mouseenter)/)) 
            evtName = o.slideTrigger_open = "click";

        // must remove double-click-toggle when using dblclick-slide
        if (o.resizerDblClickToggle && evtName.match(/click/)) {
            $R[enable ? "unbind" : "bind"]('dblclick.'+ sID, toggle)
        }

        $R
            // add or remove event
            [enable ? "bind" : "unbind"](evtName +'.'+ sID, slideOpen)
            // set the appropriate cursor & title/tip
            .css("cursor", enable ? o.sliderCursor : "default")
            .attr("title", enable ? o.tips.Slide : "")
        ;
    }

    /**
    * Add or remove 'mouseleave' events to 'slide close' when pane is 'sliding' open or closed
    * Also increases zIndex when pane is sliding open
    * See bindStartSlidingEvents for code to control 'slide open'
    *
    * @see  slideOpen(), slideClose()
    * @param {string}    pane    The pane to process, 'north', 'south', etc.
    * @param {boolean}    enable    Enable or Disable events?
    */
,    bindStopSlidingEvents = function (pane, enable) {
        var    o        = options[pane]
        ,    s        = state[pane]
        ,    c        = _c[pane]
        ,    z        = options.zIndexes
        ,    evtName    = o.slideTrigger_close.toLowerCase()
        ,    action    = (enable ? "bind" : "unbind")
        ,    $P        = $Ps[pane]
        ,    $R        = $Rs[pane]
        ;
        timer.clear(pane+"_closeSlider"); // just in case

        if (enable) {
            s.isSliding = true;
            state.panesSliding[pane] = true;
            // remove 'slideOpen' event from resizer
            // ALSO will raise the zIndex of the pane & resizer
            bindStartSlidingEvents(pane, false);
        }
        else {
            s.isSliding = false;
            delete state.panesSliding[pane];
        }

        // RE/SET zIndex - increases when pane is sliding-open, resets to normal when not
        $P.css("zIndex", enable ? z.pane_sliding : z.pane_normal);
        $R.css("zIndex", enable ? z.pane_sliding+2 : z.resizer_normal); // NOTE: mask = pane_sliding+1

        // make sure we have a valid event
        if (!evtName.match(/(click|mouseleave)/))
            evtName = o.slideTrigger_close = "mouseleave"; // also catches 'mouseout'

        // add/remove slide triggers
        $R[action](evtName, slideClose); // base event on resize
        // need extra events for mouseleave
        if (evtName === "mouseleave") {
            // also close on pane.mouseleave
            $P[action]("mouseleave."+ sID, slideClose);
            // cancel timer when mouse moves between 'pane' and 'resizer'
            $R[action]("mouseenter."+ sID, cancelMouseOut);
            $P[action]("mouseenter."+ sID, cancelMouseOut);
        }

        if (!enable)
            timer.clear(pane+"_closeSlider");
        else if (evtName === "click" && !o.resizable) {
            // IF pane is not resizable (which already has a cursor and tip) 
            // then set the a cursor & title/tip on resizer when sliding
            $R.css("cursor", enable ? o.sliderCursor : "default");
            $R.attr("title", enable ? o.tips.Close : ""); // use Toggler-tip, eg: "Close Pane"
        }

        // SUBROUTINE for mouseleave timer clearing
        function cancelMouseOut (evt) {
            timer.clear(pane+"_closeSlider");
            evt.stopPropagation();
        }
    }


    /**
    * Hides/closes a pane if there is insufficient room - reverses this when there is room again
    * MUST have already called setSizeLimits() before calling this method
    *
    * @param {string}    pane                    The pane being resized
    * @param {boolean=}    [isOpening=false]        Called from onOpen?
    * @param {boolean=}    [skipCallback=false]    Should the onresize callback be run?
    * @param {boolean=}    [force=false]
    */
,    makePaneFit = function (pane, isOpening, skipCallback, force) {
        var    o    = options[pane]
        ,    s    = state[pane]
        ,    c    = _c[pane]
        ,    $P    = $Ps[pane]
        ,    $R    = $Rs[pane]
        ,    isSidePane     = c.dir==="vert"
        ,    hasRoom        = false
        ;
        // special handling for center & east/west panes
        if (pane === "center" || (isSidePane && s.noVerticalRoom)) {
            // see if there is enough room to display the pane
            // ERROR: hasRoom = s.minHeight <= s.maxHeight && (isSidePane || s.minWidth <= s.maxWidth);
            hasRoom = (s.maxHeight >= 0);
            if (hasRoom && s.noRoom) { // previously hidden due to noRoom, so show now
                _showPane(pane);
                if ($R) $R.show();
                s.isVisible = true;
                s.noRoom = false;
                if (isSidePane) s.noVerticalRoom = false;
                _fixIframe(pane);
            }
            else if (!hasRoom && !s.noRoom) { // not currently hidden, so hide now
                _hidePane(pane);
                if ($R) $R.hide();
                s.isVisible = false;
                s.noRoom = true;
            }
        }

        // see if there is enough room to fit the border-pane
        if (pane === "center") {
            // ignore center in this block
        }
        else if (s.minSize <= s.maxSize) { // pane CAN fit
            hasRoom = true;
            if (s.size > s.maxSize) // pane is too big - shrink it
                sizePane(pane, s.maxSize, skipCallback, true, force); // true = noAnimation
            else if (s.size < s.minSize) // pane is too small - enlarge it
                sizePane(pane, s.minSize, skipCallback, true, force); // true = noAnimation
            // need s.isVisible because new pseudoClose method keeps pane visible, but off-screen
            else if ($R && s.isVisible && $P.is(":visible")) {
                // make sure resizer-bar is positioned correctly
                // handles situation where nested layout was 'hidden' when initialized
                var    pos = s.size + sC.inset[c.side];
                if ($.layout.cssNum( $R, c.side ) != pos) $R.css( c.side, pos );
            }

            // if was previously hidden due to noRoom, then RESET because NOW there is room
            if (s.noRoom) {
                // s.noRoom state will be set by open or show
                if (s.wasOpen && o.closable) {
                    if (o.autoReopen)
                        open(pane, false, true, true); // true = noAnimation, true = noAlert
                    else // leave the pane closed, so just update state
                        s.noRoom = false;
                }
                else
                    show(pane, s.wasOpen, true, true); // true = noAnimation, true = noAlert
            }
        }
        else { // !hasRoom - pane CANNOT fit
            if (!s.noRoom) { // pane not set as noRoom yet, so hide or close it now...
                s.noRoom = true; // update state
                s.wasOpen = !s.isClosed && !s.isSliding;
                if (s.isClosed){} // SKIP
                else if (o.closable) // 'close' if possible
                    close(pane, true, true); // true = force, true = noAnimation
                else // 'hide' pane if cannot just be closed
                    hide(pane, true); // true = noAnimation
            }
        }
    }


    /**
    * manualSizePane is an exposed flow-through method allowing extra code when pane is 'manually resized'
    *
    * @param {(string|Object)}    evt_or_pane                The pane being resized
    * @param {number}            size                    The *desired* new size for this pane - will be validated
    * @param {boolean=}            [skipCallback=false]    Should the onresize callback be run?
    * @param {boolean=}            [noAnimation=false]
    * @param {boolean=}            [force=false]            Force resizing even if does not seem necessary
    */
,    manualSizePane = function (evt_or_pane, size, skipCallback, noAnimation, force) {
        if (!isInitialized()) return;
        var    pane = evtPane.call(this, evt_or_pane)
        ,    o    = options[pane]
        ,    s    = state[pane]
        //    if resizing callbacks have been delayed and resizing is now DONE, force resizing to complete...
        ,    forceResize = force || (o.livePaneResizing && !s.isResizing)
        ;
        // ANY call to manualSizePane disables autoResize - ie, percentage sizing
        s.autoResize = false;
        // flow-through...
        sizePane(pane, size, skipCallback, noAnimation, forceResize); // will animate resize if option enabled
    }

    /**
    * sizePane is called only by internal methods whenever a pane needs to be resized
    *
    * @param {(string|Object)}    evt_or_pane                The pane being resized
    * @param {number}            size                    The *desired* new size for this pane - will be validated
    * @param {boolean=}            [skipCallback=false]    Should the onresize callback be run?
    * @param {boolean=}            [noAnimation=false]
    * @param {boolean=}            [force=false]            Force resizing even if does not seem necessary
    */
,    sizePane = function (evt_or_pane, size, skipCallback, noAnimation, force) {
        if (!isInitialized()) return;
        var    pane    = evtPane.call(this, evt_or_pane) // probably NEVER called from event?
        ,    o        = options[pane]
        ,    s        = state[pane]
        ,    $P        = $Ps[pane]
        ,    $R        = $Rs[pane]
        ,    side    = _c[pane].side
        ,    dimName    = _c[pane].sizeType.toLowerCase()
        ,    skipResizeWhileDragging = s.isResizing && !o.triggerEventsDuringLiveResize
        ,    doFX    = noAnimation !== true && o.animatePaneSizing
        ,    oldSize, newSize
        ;
        // QUEUE in case another action/animation is in progress
        $N.queue(function( queueNext ){
            // calculate 'current' min/max sizes
            setSizeLimits(pane); // update pane-state
            oldSize = s.size;
            size = _parseSize(pane, size); // handle percentages & auto
            size = max(size, _parseSize(pane, o.minSize));
            size = min(size, s.maxSize);
            if (size < s.minSize) { // not enough room for pane!
                queueNext(); // call before makePaneFit() because it needs the queue free
                makePaneFit(pane, false, skipCallback);    // will hide or close pane
                return;
            }

            // IF newSize is same as oldSize, then nothing to do - abort
            if (!force && size === oldSize)
                return queueNext();

            s.newSize = size;

            // onresize_start callback CANNOT cancel resizing because this would break the layout!
            if (!skipCallback && state.initialized && s.isVisible)
                _runCallbacks("onresize_start", pane);

            // resize the pane, and make sure its visible
            newSize = cssSize(pane, size);

            if (doFX && $P.is(":visible")) { // ANIMATE
                var fx        = $.layout.effects.size[pane] || $.layout.effects.size.all
                ,    easing    = o.fxSettings_size.easing || fx.easing
                ,    z        = options.zIndexes
                ,    props    = {};
                props[ dimName ] = newSize +'px';
                s.isMoving = true;
                // overlay all elements during animation
                $P.css({ zIndex: z.pane_animate })
                  .show().animate( props, o.fxSpeed_size, easing, function(){
                    // reset zIndex after animation
                    $P.css({ zIndex: (s.isSliding ? z.pane_sliding : z.pane_normal) });
                    s.isMoving = false;
                    delete s.newSize;
                    sizePane_2(); // continue
                    queueNext();
                });
            }
            else { // no animation
                $P.css( dimName, newSize );    // resize pane
                delete s.newSize;
                // if pane is visible, then 
                if ($P.is(":visible"))
                    sizePane_2(); // continue
                else {
                    // pane is NOT VISIBLE, so just update state data...
                    // when pane is *next opened*, it will have the new size
                    s.size = size;                // update state.size
                    $.extend(s, elDims($P));    // update state dimensions
                }
                queueNext();
            };

        });

        // SUBROUTINE
        function sizePane_2 () {
            /*    Panes are sometimes not sized precisely in some browsers!?
             *    This code will resize the pane up to 3 times to nudge the pane to the correct size
             */
            var    actual    = dimName==='width' ? $P.outerWidth() : $P.outerHeight()
            ,    tries    = [{
                               pane:        pane
                        ,    count:        1
                        ,    target:        size
                        ,    actual:        actual
                        ,    correct:    (size === actual)
                        ,    attempt:    size
                        ,    cssSize:    newSize
                        }]
            ,    lastTry = tries[0]
            ,    thisTry    = {}
            ,    msg        = 'Inaccurate size after resizing the '+ pane +'-pane.'
            ;
            while ( !lastTry.correct ) {
                thisTry = { pane: pane, count: lastTry.count+1, target: size };

                if (lastTry.actual > size)
                    thisTry.attempt = max(0, lastTry.attempt - (lastTry.actual - size));
                else // lastTry.actual < size
                    thisTry.attempt = max(0, lastTry.attempt + (size - lastTry.actual));

                thisTry.cssSize = cssSize(pane, thisTry.attempt);
                $P.css( dimName, thisTry.cssSize );

                thisTry.actual    = dimName=='width' ? $P.outerWidth() : $P.outerHeight();
                thisTry.correct    = (size === thisTry.actual);

                // log attempts and alert the user of this *non-fatal error* (if showDebugMessages)
                if ( tries.length === 1) {
                    _log(msg, false, true);
                    _log(lastTry, false, true);
                }
                _log(thisTry, false, true);
                // after 4 tries, is as close as its gonna get!
                if (tries.length > 3) break;

                tries.push( thisTry );
                lastTry = tries[ tries.length - 1 ];
            }
            // END TESTING CODE

            // update pane-state dimensions
            s.size    = size;
            $.extend(s, elDims($P));

            if (s.isVisible && $P.is(":visible")) {
                // reposition the resizer-bar
                if ($R) $R.css( side, size + sC.inset[side] );
                // resize the content-div
                sizeContent(pane);
            }

            if (!skipCallback && !skipResizeWhileDragging && state.initialized && s.isVisible)
                _runCallbacks("onresize_end", pane);

            // resize all the adjacent panes, and adjust their toggler buttons
            // when skipCallback passed, it means the controlling method will handle 'other panes'
            if (!skipCallback) {
                // also no callback if live-resize is in progress and NOT triggerEventsDuringLiveResize
                if (!s.isSliding) sizeMidPanes(_c[pane].dir=="horz" ? "" : "center", skipResizeWhileDragging, force);
                sizeHandles();
            }

            // if opposite-pane was autoClosed, see if it can be autoOpened now
            var altPane = _c.oppositeEdge[pane];
            if (size < oldSize && state[ altPane ].noRoom) {
                setSizeLimits( altPane );
                makePaneFit( altPane, false, skipCallback );
            }

            // DEBUG - ALERT user/developer so they know there was a sizing problem
            if (tries.length > 1)
                _log(msg +'\nSee the Error Console for details.', true, true);
        }
    }

    /**
    * @see  initPanes(), sizePane(),     resizeAll(), open(), close(), hide()
    * @param {(Array.<string>|string)}    panes                    The pane(s) being resized, comma-delmited string
    * @param {boolean=}                    [skipCallback=false]    Should the onresize callback be run?
    * @param {boolean=}                    [force=false]
    */
,    sizeMidPanes = function (panes, skipCallback, force) {
        panes = (panes ? panes : "east,west,center").split(",");

        $.each(panes, function (i, pane) {
            if (!$Ps[pane]) return; // NO PANE - skip
            var 
                o        = options[pane]
            ,    s        = state[pane]
            ,    $P        = $Ps[pane]
            ,    $R        = $Rs[pane]
            ,    isCenter= (pane=="center")
            ,    hasRoom    = true
            ,    CSS        = {}
            //    if pane is not visible, show it invisibly NOW rather than for *each call* in this script
            ,    visCSS    = $.layout.showInvisibly($P)

            ,    newCenter    = calcNewCenterPaneDims()
            ;

            // update pane-state dimensions
            $.extend(s, elDims($P));

            if (pane === "center") {
                if (!force && s.isVisible && newCenter.width === s.outerWidth && newCenter.height === s.outerHeight) {
                    $P.css(visCSS);
                    return true; // SKIP - pane already the correct size
                }
                // set state for makePaneFit() logic
                $.extend(s, cssMinDims(pane), {
                    maxWidth:    newCenter.width
                ,    maxHeight:    newCenter.height
                });
                CSS = newCenter;
                s.newWidth    = CSS.width;
                s.newHeight    = CSS.height;
                // convert OUTER width/height to CSS width/height 
                CSS.width    = cssW($P, CSS.width);
                // NEW - allow pane to extend 'below' visible area rather than hide it
                CSS.height    = cssH($P, CSS.height);
                hasRoom        = CSS.width >= 0 && CSS.height >= 0; // height >= 0 = ALWAYS TRUE NOW

                // during layout init, try to shrink east/west panes to make room for center
                if (!state.initialized && o.minWidth > newCenter.width) {
                    var
                        reqPx    = o.minWidth - s.outerWidth
                    ,    minE    = options.east.minSize || 0
                    ,    minW    = options.west.minSize || 0
                    ,    sizeE    = state.east.size
                    ,    sizeW    = state.west.size
                    ,    newE    = sizeE
                    ,    newW    = sizeW
                    ;
                    if (reqPx > 0 && state.east.isVisible && sizeE > minE) {
                        newE = max( sizeE-minE, sizeE-reqPx );
                        reqPx -= sizeE-newE;
                    }
                    if (reqPx > 0 && state.west.isVisible && sizeW > minW) {
                        newW = max( sizeW-minW, sizeW-reqPx );
                        reqPx -= sizeW-newW;
                    }
                    // IF we found enough extra space, then resize the border panes as calculated
                    if (reqPx === 0) {
                        if (sizeE && sizeE != minE)
                            sizePane('east', newE, true, true, force); // true = skipCallback/noAnimation - initPanes will handle when done
                        if (sizeW && sizeW != minW)
                            sizePane('west', newW, true, true, force); // true = skipCallback/noAnimation
                        // now start over!
                        sizeMidPanes('center', skipCallback, force);
                        $P.css(visCSS);
                        return; // abort this loop
                    }
                }
            }
            else { // for east and west, set only the height, which is same as center height
                // set state.min/maxWidth/Height for makePaneFit() logic
                if (s.isVisible && !s.noVerticalRoom)
                    $.extend(s, elDims($P), cssMinDims(pane))
                if (!force && !s.noVerticalRoom && newCenter.height === s.outerHeight) {
                    $P.css(visCSS);
                    return true; // SKIP - pane already the correct size
                }
                // east/west have same top, bottom & height as center
                CSS.top        = newCenter.top;
                CSS.bottom    = newCenter.bottom;
                s.newSize    = newCenter.height
                // NEW - allow pane to extend 'below' visible area rather than hide it
                CSS.height    = cssH($P, newCenter.height);
                s.maxHeight    = CSS.height;
                hasRoom        = (s.maxHeight >= 0); // ALWAYS TRUE NOW
                if (!hasRoom) s.noVerticalRoom = true; // makePaneFit() logic
            }

            if (hasRoom) {
                // resizeAll passes skipCallback because it triggers callbacks after ALL panes are resized
                if (!skipCallback && state.initialized)
                    _runCallbacks("onresize_start", pane);

                $P.css(CSS); // apply the CSS to pane
                if (pane !== "center")
                    sizeHandles(pane); // also update resizer length
                if (s.noRoom && !s.isClosed && !s.isHidden)
                    makePaneFit(pane); // will re-open/show auto-closed/hidden pane
                if (s.isVisible) {
                    $.extend(s, elDims($P)); // update pane dimensions
                    if (state.initialized) sizeContent(pane); // also resize the contents, if exists
                }
            }
            else if (!s.noRoom && s.isVisible) // no room for pane
                makePaneFit(pane); // will hide or close pane

            // reset visibility, if necessary
            $P.css(visCSS);

            delete s.newSize;
            delete s.newWidth;
            delete s.newHeight;

            if (!s.isVisible)
                return true; // DONE - next pane

            /*
            * Extra CSS for IE6 or IE7 in Quirks-mode - add 'width' to NORTH/SOUTH panes
            * Normally these panes have only 'left' & 'right' positions so pane auto-sizes
            * ALSO required when pane is an IFRAME because will NOT default to 'full width'
            *    TODO: Can I use width:100% for a north/south iframe?
            *    TODO: Sounds like a job for $P.outerWidth( sC.innerWidth ) SETTER METHOD
            */
            if (pane === "center") { // finished processing midPanes
                var fix = browser.isIE6 || !browser.boxModel;
                if ($Ps.north && (fix || state.north.tagName=="IFRAME")) 
                    $Ps.north.css("width", cssW($Ps.north, sC.innerWidth));
                if ($Ps.south && (fix || state.south.tagName=="IFRAME"))
                    $Ps.south.css("width", cssW($Ps.south, sC.innerWidth));
            }

            // resizeAll passes skipCallback because it triggers callbacks after ALL panes are resized
            if (!skipCallback && state.initialized)
                _runCallbacks("onresize_end", pane);
        });
    }


    /**
    * @see  window.onresize(), callbacks or custom code
    * @param {(Object|boolean)=}    evt_or_refresh    If 'true', then also reset pane-positioning
    */
,    resizeAll = function (evt_or_refresh) {
        var    oldW    = sC.innerWidth
        ,    oldH    = sC.innerHeight
        ;
        // stopPropagation if called by trigger("layoutdestroy") - use evtPane utility 
        evtPane(evt_or_refresh);

        // cannot size layout when 'container' is hidden or collapsed
        if (!$N.is(":visible")) return;

        if (!state.initialized) {
            _initLayoutElements();
            return; // no need to resize since we just initialized!
        }

        if (evt_or_refresh === true && $.isPlainObject(options.outset)) {
            // update container CSS in case outset option has changed
            $N.css( options.outset );
        }
        // UPDATE container dimensions
        $.extend(sC, elDims( $N, options.inset ));
        if (!sC.outerHeight) return;

        // if 'true' passed, refresh pane & handle positioning too
        if (evt_or_refresh === true) {
            setPanePosition();
        }

        // onresizeall_start will CANCEL resizing if returns false
        // state.container has already been set, so user can access this info for calcuations
        if (false === _runCallbacks("onresizeall_start")) return false;

        var    // see if container is now 'smaller' than before
            shrunkH    = (sC.innerHeight < oldH)
        ,    shrunkW    = (sC.innerWidth < oldW)
        ,    $P, o, s
        ;
        // NOTE special order for sizing: S-N-E-W
        $.each(["south","north","east","west"], function (i, pane) {
            if (!$Ps[pane]) return; // no pane - SKIP
            o = options[pane];
            s = state[pane];
            if (s.autoResize && s.size != o.size) // resize pane to original size set in options
                sizePane(pane, o.size, true, true, true); // true=skipCallback/noAnimation/forceResize
            else {
                setSizeLimits(pane);
                makePaneFit(pane, false, true, true); // true=skipCallback/forceResize
            }
        });

        sizeMidPanes("", true, true); // true=skipCallback/forceResize
        sizeHandles(); // reposition the toggler elements

        // trigger all individual pane callbacks AFTER layout has finished resizing
        $.each(_c.allPanes, function (i, pane) {
            $P = $Ps[pane];
            if (!$P) return; // SKIP
            if (state[pane].isVisible) // undefined for non-existent panes
                _runCallbacks("onresize_end", pane); // callback - if exists
        });

        _runCallbacks("onresizeall_end");
        //_triggerLayoutEvent(pane, 'resizeall');
    }

    /**
    * Whenever a pane resizes or opens that has a nested layout, trigger resizeAll
    *
    * @param {(string|Object)}    evt_or_pane        The pane just resized or opened
    */
,    resizeChildren = function (evt_or_pane, skipRefresh) {
        var    pane = evtPane.call(this, evt_or_pane);

        if (!options[pane].resizeChildren) return;

        // ensure the pane-children are up-to-date
        if (!skipRefresh) refreshChildren( pane );
        var pC = children[pane];
        if ($.isPlainObject( pC )) {
            // resize one or more children
            $.each( pC, function (key, child) {
                if (!child.destroyed) child.resizeAll();
            });
        }
    }

    /**
    * IF pane has a content-div, then resize all elements inside pane to fit pane-height
    *
    * @param {(string|Object)}    evt_or_panes        The pane(s) being resized
    * @param {boolean=}            [remeasure=false]    Should the content (header/footer) be remeasured?
    */
,    sizeContent = function (evt_or_panes, remeasure) {
        if (!isInitialized()) return;

        var panes = evtPane.call(this, evt_or_panes);
        panes = panes ? panes.split(",") : _c.allPanes;

        $.each(panes, function (idx, pane) {
            var
                $P    = $Ps[pane]
            ,    $C    = $Cs[pane]
            ,    o    = options[pane]
            ,    s    = state[pane]
            ,    m    = s.content // m = measurements
            ;
            if (!$P || !$C || !$P.is(":visible")) return true; // NOT VISIBLE - skip

            // if content-element was REMOVED, update OR remove the pointer
            if (!$C.length) {
                initContent(pane, false);    // false = do NOT sizeContent() - already there!
                if (!$C) return;            // no replacement element found - pointer have been removed
            }

            // onsizecontent_start will CANCEL resizing if returns false
            if (false === _runCallbacks("onsizecontent_start", pane)) return;

            // skip re-measuring offsets if live-resizing
            if ((!s.isMoving && !s.isResizing) || o.liveContentResizing || remeasure || m.top == undefined) {
                _measure();
                // if any footers are below pane-bottom, they may not measure correctly,
                // so allow pane overflow and re-measure
                if (m.hiddenFooters > 0 && $P.css("overflow") === "hidden") {
                    $P.css("overflow", "visible");
                    _measure(); // remeasure while overflowing
                    $P.css("overflow", "hidden");
                }
            }
            // NOTE: spaceAbove/Below *includes* the pane paddingTop/Bottom, but not pane.borders
            var newH = s.innerHeight - (m.spaceAbove - s.css.paddingTop) - (m.spaceBelow - s.css.paddingBottom);

            if (!$C.is(":visible") || m.height != newH) {
                // size the Content element to fit new pane-size - will autoHide if not enough room
                setOuterHeight($C, newH, true); // true=autoHide
                m.height = newH; // save new height
            };

            if (state.initialized)
                _runCallbacks("onsizecontent_end", pane);

            function _below ($E) {
                return max(s.css.paddingBottom, (parseInt($E.css("marginBottom"), 10) || 0));
            };

            function _measure () {
                var
                    ignore    = options[pane].contentIgnoreSelector
                ,    $Fs        = $C.nextAll().not(".ui-layout-mask").not(ignore || ":lt(0)") // not :lt(0) = ALL
                ,    $Fs_vis    = $Fs.filter(':visible')
                ,    $F        = $Fs_vis.filter(':last')
                ;
                m = {
                    top:            $C[0].offsetTop
                ,    height:            $C.outerHeight()
                ,    numFooters:        $Fs.length
                ,    hiddenFooters:    $Fs.length - $Fs_vis.length
                ,    spaceBelow:        0 // correct if no content footer ($E)
                }
                    m.spaceAbove    = m.top; // just for state - not used in calc
                    m.bottom        = m.top + m.height;
                if ($F.length)
                    //spaceBelow = (LastFooter.top + LastFooter.height) [footerBottom] - Content.bottom + max(LastFooter.marginBottom, pane.paddingBotom)
                    m.spaceBelow = ($F[0].offsetTop + $F.outerHeight()) - m.bottom + _below($F);
                else // no footer - check marginBottom on Content element itself
                    m.spaceBelow = _below($C);
            };
        });
    }


    /**
    * Called every time a pane is opened, closed, or resized to slide the togglers to 'center' and adjust their length if necessary
    *
    * @see  initHandles(), open(), close(), resizeAll()
    * @param {(string|Object)=}        evt_or_panes    The pane(s) being resized
    */
,    sizeHandles = function (evt_or_panes) {
        var panes = evtPane.call(this, evt_or_panes)
        panes = panes ? panes.split(",") : _c.borderPanes;

        $.each(panes, function (i, pane) {
            var 
                o    = options[pane]
            ,    s    = state[pane]
            ,    $P    = $Ps[pane]
            ,    $R    = $Rs[pane]
            ,    $T    = $Ts[pane]
            ,    $TC
            ;
            if (!$P || !$R) return;

            var
                dir            = _c[pane].dir
            ,    _state        = (s.isClosed ? "_closed" : "_open")
            ,    spacing        = o["spacing"+ _state]
            ,    togAlign    = o["togglerAlign"+ _state]
            ,    togLen        = o["togglerLength"+ _state]
            ,    paneLen
            ,    left
            ,    offset
            ,    CSS = {}
            ;

            if (spacing === 0) {
                $R.hide();
                return;
            }
            else if (!s.noRoom && !s.isHidden) // skip if resizer was hidden for any reason
                $R.show(); // in case was previously hidden

            // Resizer Bar is ALWAYS same width/height of pane it is attached to
            if (dir === "horz") { // north/south
                //paneLen = $P.outerWidth(); // s.outerWidth || 
                paneLen = sC.innerWidth; // handle offscreen-panes
                s.resizerLength = paneLen;
                left = $.layout.cssNum($P, "left")
                $R.css({
                    width:    cssW($R, paneLen) // account for borders & padding
                ,    height:    cssH($R, spacing) // ditto
                ,    left:    left > -9999 ? left : sC.inset.left // handle offscreen-panes
                });
            }
            else { // east/west
                paneLen = $P.outerHeight(); // s.outerHeight || 
                s.resizerLength = paneLen;
                $R.css({
                    height:    cssH($R, paneLen) // account for borders & padding
                ,    width:    cssW($R, spacing) // ditto
                ,    top:    sC.inset.top + getPaneSize("north", true) // TODO: what if no North pane?
                //,    top:    $.layout.cssNum($Ps["center"], "top")
                });
            }

            // remove hover classes
            removeHover( o, $R );

            if ($T) {
                if (togLen === 0 || (s.isSliding && o.hideTogglerOnSlide)) {
                    $T.hide(); // always HIDE the toggler when 'sliding'
                    return;
                }
                else
                    $T.show(); // in case was previously hidden

                if (!(togLen > 0) || togLen === "100%" || togLen > paneLen) {
                    togLen = paneLen;
                    offset = 0;
                }
                else { // calculate 'offset' based on options.PANE.togglerAlign_open/closed
                    if (isStr(togAlign)) {
                        switch (togAlign) {
                            case "top":
                            case "left":    offset = 0;
                                            break;
                            case "bottom":
                            case "right":    offset = paneLen - togLen;
                                            break;
                            case "middle":
                            case "center":
                            default:        offset = round((paneLen - togLen) / 2); // 'default' catches typos
                        }
                    }
                    else { // togAlign = number
                        var x = parseInt(togAlign, 10); //
                        if (togAlign >= 0) offset = x;
                        else offset = paneLen - togLen + x; // NOTE: x is negative!
                    }
                }

                if (dir === "horz") { // north/south
                    var width = cssW($T, togLen);
                    $T.css({
                        width:    width  // account for borders & padding
                    ,    height:    cssH($T, spacing) // ditto
                    ,    left:    offset // TODO: VERIFY that toggler  positions correctly for ALL values
                    ,    top:    0
                    });
                    // CENTER the toggler content SPAN
                    $T.children(".content").each(function(){
                        $TC = $(this);
                        $TC.css("marginLeft", round((width-$TC.outerWidth())/2)); // could be negative
                    });
                }
                else { // east/west
                    var height = cssH($T, togLen);
                    $T.css({
                        height:    height // account for borders & padding
                    ,    width:    cssW($T, spacing) // ditto
                    ,    top:    offset // POSITION the toggler
                    ,    left:    0
                    });
                    // CENTER the toggler content SPAN
                    $T.children(".content").each(function(){
                        $TC = $(this);
                        $TC.css("marginTop", round((height-$TC.outerHeight())/2)); // could be negative
                    });
                }

                // remove ALL hover classes
                removeHover( 0, $T );
            }

            // DONE measuring and sizing this resizer/toggler, so can be 'hidden' now
            if (!state.initialized && (o.initHidden || s.isHidden)) {
                $R.hide();
                if ($T) $T.hide();
            }
        });
    }


    /**
    * @param {(string|Object)}    evt_or_pane
    */
,    enableClosable = function (evt_or_pane) {
        if (!isInitialized()) return;
        var    pane = evtPane.call(this, evt_or_pane)
        ,    $T    = $Ts[pane]
        ,    o    = options[pane]
        ;
        if (!$T) return;
        o.closable = true;
        $T    .bind("click."+ sID, function(evt){ evt.stopPropagation(); toggle(pane); })
            .css("visibility", "visible")
            .css("cursor", "pointer")
            .attr("title", state[pane].isClosed ? o.tips.Open : o.tips.Close) // may be blank
            .show();
    }
    /**
    * @param {(string|Object)}    evt_or_pane
    * @param {boolean=}            [hide=false]
    */
,    disableClosable = function (evt_or_pane, hide) {
        if (!isInitialized()) return;
        var    pane = evtPane.call(this, evt_or_pane)
        ,    $T    = $Ts[pane]
        ;
        if (!$T) return;
        options[pane].closable = false;
        // is closable is disable, then pane MUST be open!
        if (state[pane].isClosed) open(pane, false, true);
        $T    .unbind("."+ sID)
            .css("visibility", hide ? "hidden" : "visible") // instead of hide(), which creates logic issues
            .css("cursor", "default")
            .attr("title", "");
    }


    /**
    * @param {(string|Object)}    evt_or_pane
    */
,    enableSlidable = function (evt_or_pane) {
        if (!isInitialized()) return;
        var    pane = evtPane.call(this, evt_or_pane)
        ,    $R    = $Rs[pane]
        ;
        if (!$R || !$R.data('draggable')) return;
        options[pane].slidable = true; 
        if (state[pane].isClosed)
            bindStartSlidingEvents(pane, true);
    }
    /**
    * @param {(string|Object)}    evt_or_pane
    */
,    disableSlidable = function (evt_or_pane) {
        if (!isInitialized()) return;
        var    pane = evtPane.call(this, evt_or_pane)
        ,    $R    = $Rs[pane]
        ;
        if (!$R) return;
        options[pane].slidable = false; 
        if (state[pane].isSliding)
            close(pane, false, true);
        else {
            bindStartSlidingEvents(pane, false);
            $R    .css("cursor", "default")
                .attr("title", "");
            removeHover(null, $R[0]); // in case currently hovered
        }
    }


    /**
    * @param {(string|Object)}    evt_or_pane
    */
,    enableResizable = function (evt_or_pane) {
        if (!isInitialized()) return;
        var    pane = evtPane.call(this, evt_or_pane)
        ,    $R    = $Rs[pane]
        ,    o    = options[pane]
        ;
        if (!$R || !$R.data('draggable')) return;
        o.resizable = true; 
        $R.draggable("enable");
        if (!state[pane].isClosed)
            $R    .css("cursor", o.resizerCursor)
                 .attr("title", o.tips.Resize);
    }
    /**
    * @param {(string|Object)}    evt_or_pane
    */
,    disableResizable = function (evt_or_pane) {
        if (!isInitialized()) return;
        var    pane = evtPane.call(this, evt_or_pane)
        ,    $R    = $Rs[pane]
        ;
        if (!$R || !$R.data('draggable')) return;
        options[pane].resizable = false; 
        $R    .draggable("disable")
            .css("cursor", "default")
            .attr("title", "");
        removeHover(null, $R[0]); // in case currently hovered
    }


    /**
    * Move a pane from source-side (eg, west) to target-side (eg, east)
    * If pane exists on target-side, move that to source-side, ie, 'swap' the panes
    *
    * @param {(string|Object)}    evt_or_pane1    The pane/edge being swapped
    * @param {string}            pane2            ditto
    */
,    swapPanes = function (evt_or_pane1, pane2) {
        if (!isInitialized()) return;
        var pane1 = evtPane.call(this, evt_or_pane1);
        // change state.edge NOW so callbacks can know where pane is headed...
        state[pane1].edge = pane2;
        state[pane2].edge = pane1;
        // run these even if NOT state.initialized
        if (false === _runCallbacks("onswap_start", pane1)
         ||    false === _runCallbacks("onswap_start", pane2)
        ) {
            state[pane1].edge = pane1; // reset
            state[pane2].edge = pane2;
            return;
        }

        var
            oPane1    = copy( pane1 )
        ,    oPane2    = copy( pane2 )
        ,    sizes    = {}
        ;
        sizes[pane1] = oPane1 ? oPane1.state.size : 0;
        sizes[pane2] = oPane2 ? oPane2.state.size : 0;

        // clear pointers & state
        $Ps[pane1] = false; 
        $Ps[pane2] = false;
        state[pane1] = {};
        state[pane2] = {};
        
        // ALWAYS remove the resizer & toggler elements
        if ($Ts[pane1]) $Ts[pane1].remove();
        if ($Ts[pane2]) $Ts[pane2].remove();
        if ($Rs[pane1]) $Rs[pane1].remove();
        if ($Rs[pane2]) $Rs[pane2].remove();
        $Rs[pane1] = $Rs[pane2] = $Ts[pane1] = $Ts[pane2] = false;

        // transfer element pointers and data to NEW Layout keys
        move( oPane1, pane2 );
        move( oPane2, pane1 );

        // cleanup objects
        oPane1 = oPane2 = sizes = null;

        // make panes 'visible' again
        if ($Ps[pane1]) $Ps[pane1].css(_c.visible);
        if ($Ps[pane2]) $Ps[pane2].css(_c.visible);

        // fix any size discrepancies caused by swap
        resizeAll();

        // run these even if NOT state.initialized
        _runCallbacks("onswap_end", pane1);
        _runCallbacks("onswap_end", pane2);

        return;

        function copy (n) { // n = pane
            var
                $P    = $Ps[n]
            ,    $C    = $Cs[n]
            ;
            return !$P ? false : {
                pane:        n
            ,    P:            $P ? $P[0] : false
            ,    C:            $C ? $C[0] : false
            ,    state:        $.extend(true, {}, state[n])
            ,    options:    $.extend(true, {}, options[n])
            }
        };

        function move (oPane, pane) {
            if (!oPane) return;
            var
                P        = oPane.P
            ,    C        = oPane.C
            ,    oldPane = oPane.pane
            ,    c        = _c[pane]
            //    save pane-options that should be retained
            ,    s        = $.extend(true, {}, state[pane])
            ,    o        = options[pane]
            //    RETAIN side-specific FX Settings - more below
            ,    fx        = { resizerCursor: o.resizerCursor }
            ,    re, size, pos
            ;
            $.each("fxName,fxSpeed,fxSettings".split(","), function (i, k) {
                fx[k +"_open"]  = o[k +"_open"];
                fx[k +"_close"] = o[k +"_close"];
                fx[k +"_size"]  = o[k +"_size"];
            });

            // update object pointers and attributes
            $Ps[pane] = $(P)
                .data({
                    layoutPane:        Instance[pane]    // NEW pointer to pane-alias-object
                ,    layoutEdge:        pane
                })
                .css(_c.hidden)
                .css(c.cssReq)
            ;
            $Cs[pane] = C ? $(C) : false;

            // set options and state
            options[pane]    = $.extend(true, {}, oPane.options, fx);
            state[pane]        = $.extend(true, {}, oPane.state);

            // change classNames on the pane, eg: ui-layout-pane-east ==> ui-layout-pane-west
            re = new RegExp(o.paneClass +"-"+ oldPane, "g");
            P.className = P.className.replace(re, o.paneClass +"-"+ pane);

            // ALWAYS regenerate the resizer & toggler elements
            initHandles(pane); // create the required resizer & toggler

            // if moving to different orientation, then keep 'target' pane size
            if (c.dir != _c[oldPane].dir) {
                size = sizes[pane] || 0;
                setSizeLimits(pane); // update pane-state
                size = max(size, state[pane].minSize);
                // use manualSizePane to disable autoResize - not useful after panes are swapped
                manualSizePane(pane, size, true, true); // true/true = skipCallback/noAnimation
            }
            else // move the resizer here
                $Rs[pane].css(c.side, sC.inset[c.side] + (state[pane].isVisible ? getPaneSize(pane) : 0));


            // ADD CLASSNAMES & SLIDE-BINDINGS
            if (oPane.state.isVisible && !s.isVisible)
                setAsOpen(pane, true); // true = skipCallback
            else {
                setAsClosed(pane);
                bindStartSlidingEvents(pane, true); // will enable events IF option is set
            }

            // DESTROY the object
            oPane = null;
        };
    }


    /**
    * INTERNAL method to sync pin-buttons when pane is opened or closed
    * Unpinned means the pane is 'sliding' - ie, over-top of the adjacent panes
    *
    * @see  open(), setAsOpen(), setAsClosed()
    * @param {string}    pane   These are the params returned to callbacks by layout()
    * @param {boolean}    doPin  True means set the pin 'down', False means 'up'
    */
,    syncPinBtns = function (pane, doPin) {
        if ($.layout.plugins.buttons)
            $.each(state[pane].pins, function (i, selector) {
                $.layout.buttons.setPinState(Instance, $(selector), pane, doPin);
            });
    }

;    // END var DECLARATIONS

    /**
    * Capture keys when enableCursorHotkey - toggle pane if hotkey pressed
    *
    * @see  document.keydown()
    */
    function keyDown (evt) {
        if (!evt) return true;
        var code = evt.keyCode;
        if (code < 33) return true; // ignore special keys: ENTER, TAB, etc

        var
            PANE = {
                38: "north" // Up Cursor    - $.ui.keyCode.UP
            ,    40: "south" // Down Cursor    - $.ui.keyCode.DOWN
            ,    37: "west"  // Left Cursor    - $.ui.keyCode.LEFT
            ,    39: "east"  // Right Cursor    - $.ui.keyCode.RIGHT
            }
        ,    ALT        = evt.altKey // no worky!
        ,    SHIFT    = evt.shiftKey
        ,    CTRL    = evt.ctrlKey
        ,    CURSOR    = (CTRL && code >= 37 && code <= 40)
        ,    o, k, m, pane
        ;

        if (CURSOR && options[PANE[code]].enableCursorHotkey) // valid cursor-hotkey
            pane = PANE[code];
        else if (CTRL || SHIFT) // check to see if this matches a custom-hotkey
            $.each(_c.borderPanes, function (i, p) { // loop each pane to check its hotkey
                o = options[p];
                k = o.customHotkey;
                m = o.customHotkeyModifier; // if missing or invalid, treated as "CTRL+SHIFT"
                if ((SHIFT && m=="SHIFT") || (CTRL && m=="CTRL") || (CTRL && SHIFT)) { // Modifier matches
                    if (k && code === (isNaN(k) || k <= 9 ? k.toUpperCase().charCodeAt(0) : k)) { // Key matches
                        pane = p;
                        return false; // BREAK
                    }
                }
            });

        // validate pane
        if (!pane || !$Ps[pane] || !options[pane].closable || state[pane].isHidden)
            return true;

        toggle(pane);

        evt.stopPropagation();
        evt.returnValue = false; // CANCEL key
        return false;
    };


/*
 * ######################################
 *    UTILITY METHODS
 *    called externally or by initButtons
 * ######################################
 */

    /**
    * Change/reset a pane overflow setting & zIndex to allow popups/drop-downs to work
    *
    * @param {Object=}   [el]    (optional) Can also be 'bound' to a click, mouseOver, or other event
    */
    function allowOverflow (el) {
        if (!isInitialized()) return;
        if (this && this.tagName) el = this; // BOUND to element
        var $P;
        if (isStr(el))
            $P = $Ps[el];
        else if ($(el).data("layoutRole"))
            $P = $(el);
        else
            $(el).parents().each(function(){
                if ($(this).data("layoutRole")) {
                    $P = $(this);
                    return false; // BREAK
                }
            });
        if (!$P || !$P.length) return; // INVALID

        var
            pane    = $P.data("layoutEdge")
        ,    s        = state[pane]
        ;

        // if pane is already raised, then reset it before doing it again!
        // this would happen if allowOverflow is attached to BOTH the pane and an element 
        if (s.cssSaved)
            resetOverflow(pane); // reset previous CSS before continuing

        // if pane is raised by sliding or resizing, or its closed, then abort
        if (s.isSliding || s.isResizing || s.isClosed) {
            s.cssSaved = false;
            return;
        }

        var
            newCSS    = { zIndex: (options.zIndexes.resizer_normal + 1) }
        ,    curCSS    = {}
        ,    of        = $P.css("overflow")
        ,    ofX        = $P.css("overflowX")
        ,    ofY        = $P.css("overflowY")
        ;
        // determine which, if any, overflow settings need to be changed
        if (of != "visible") {
            curCSS.overflow = of;
            newCSS.overflow = "visible";
        }
        if (ofX && !ofX.match(/(visible|auto)/)) {
            curCSS.overflowX = ofX;
            newCSS.overflowX = "visible";
        }
        if (ofY && !ofY.match(/(visible|auto)/)) {
            curCSS.overflowY = ofX;
            newCSS.overflowY = "visible";
        }

        // save the current overflow settings - even if blank!
        s.cssSaved = curCSS;

        // apply new CSS to raise zIndex and, if necessary, make overflow 'visible'
        $P.css( newCSS );

        // make sure the zIndex of all other panes is normal
        $.each(_c.allPanes, function(i, p) {
            if (p != pane) resetOverflow(p);
        });

    };
    /**
    * @param {Object=}   [el]    (optional) Can also be 'bound' to a click, mouseOver, or other event
    */
    function resetOverflow (el) {
        if (!isInitialized()) return;
        if (this && this.tagName) el = this; // BOUND to element
        var $P;
        if (isStr(el))
            $P = $Ps[el];
        else if ($(el).data("layoutRole"))
            $P = $(el);
        else
            $(el).parents().each(function(){
                if ($(this).data("layoutRole")) {
                    $P = $(this);
                    return false; // BREAK
                }
            });
        if (!$P || !$P.length) return; // INVALID

        var
            pane    = $P.data("layoutEdge")
        ,    s        = state[pane]
        ,    CSS        = s.cssSaved || {}
        ;
        // reset the zIndex
        if (!s.isSliding && !s.isResizing)
            $P.css("zIndex", options.zIndexes.pane_normal);

        // reset Overflow - if necessary
        $P.css( CSS );

        // clear var
        s.cssSaved = false;
    };

/*
 * #####################
 * CREATE/RETURN LAYOUT
 * #####################
 */

    // validate that container exists
    var $N = $(this).eq(0); // FIRST matching Container element
    if (!$N.length) {
        return _log( options.errors.containerMissing );
    };

    // Users retrieve Instance of a layout with: $N.layout() OR $N.data("layout")
    // return the Instance-pointer if layout has already been initialized
    if ($N.data("layoutContainer") && $N.data("layout"))
        return $N.data("layout"); // cached pointer

    // init global vars
    var 
        $Ps    = {}    // Panes x5        - set in initPanes()
    ,    $Cs    = {}    // Content x5    - set in initPanes()
    ,    $Rs    = {}    // Resizers x4    - set in initHandles()
    ,    $Ts    = {}    // Togglers x4    - set in initHandles()
    ,    $Ms    = $([])    // Masks - up to 2 masks per pane (IFRAME + DIV)
    //    aliases for code brevity
    ,    sC    = state.container // alias for easy access to 'container dimensions'
    ,    sID    = state.id // alias for unique layout ID/namespace - eg: "layout435"
    ;

    // create Instance object to expose data & option Properties, and primary action Methods
    var Instance = {
    //    layout data
        options:            options            // property - options hash
    ,    state:                state            // property - dimensions hash
    //    object pointers
    ,    container:            $N                // property - object pointers for layout container
    ,    panes:                $Ps                // property - object pointers for ALL Panes: panes.north, panes.center
    ,    contents:            $Cs                // property - object pointers for ALL Content: contents.north, contents.center
    ,    resizers:            $Rs                // property - object pointers for ALL Resizers, eg: resizers.north
    ,    togglers:            $Ts                // property - object pointers for ALL Togglers, eg: togglers.north
    //    border-pane open/close
    ,    hide:                hide            // method - ditto
    ,    show:                show            // method - ditto
    ,    toggle:                toggle            // method - pass a 'pane' ("north", "west", etc)
    ,    open:                open            // method - ditto
    ,    close:                close            // method - ditto
    ,    slideOpen:            slideOpen        // method - ditto
    ,    slideClose:            slideClose        // method - ditto
    ,    slideToggle:        slideToggle        // method - ditto
    //    pane actions
    ,    setSizeLimits:        setSizeLimits    // method - pass a 'pane' - update state min/max data
    ,    _sizePane:            sizePane        // method -intended for user by plugins only!
    ,    sizePane:            manualSizePane    // method - pass a 'pane' AND an 'outer-size' in pixels or percent, or 'auto'
    ,    sizeContent:        sizeContent        // method - pass a 'pane'
    ,    swapPanes:            swapPanes        // method - pass TWO 'panes' - will swap them
    ,    showMasks:            showMasks        // method - pass a 'pane' OR list of panes - default = all panes with mask option set
    ,    hideMasks:            hideMasks        // method - ditto'
    //    pane element methods
    ,    initContent:        initContent        // method - ditto
    ,    addPane:            addPane            // method - pass a 'pane'
    ,    removePane:            removePane        // method - pass a 'pane' to remove from layout, add 'true' to delete the pane-elem
    ,    createChildren:        createChildren    // method - pass a 'pane' and (optional) layout-options (OVERRIDES options[pane].children
    ,    refreshChildren:    refreshChildren    // method - pass a 'pane' and a layout-instance
    //    special pane option setting
    ,    enableClosable:        enableClosable    // method - pass a 'pane'
    ,    disableClosable:    disableClosable    // method - ditto
    ,    enableSlidable:        enableSlidable    // method - ditto
    ,    disableSlidable:    disableSlidable    // method - ditto
    ,    enableResizable:    enableResizable    // method - ditto
    ,    disableResizable:    disableResizable// method - ditto
    //    utility methods for panes
    ,    allowOverflow:        allowOverflow    // utility - pass calling element (this)
    ,    resetOverflow:        resetOverflow    // utility - ditto
    //    layout control
    ,    destroy:            destroy            // method - no parameters
    ,    initPanes:            isInitialized    // method - no parameters
    ,    resizeAll:            resizeAll        // method - no parameters
    //    callback triggering
    ,    runCallbacks:        _runCallbacks    // method - pass evtName & pane (if a pane-event), eg: trigger("onopen", "west")
    //    alias collections of options, state and children - created in addPane and extended elsewhere
    ,    hasParentLayout:    false            // set by initContainer()
    ,    children:            children        // pointers to child-layouts, eg: Instance.children.west.layoutName
    ,    north:                false            // alias group: { name: pane, pane: $Ps[pane], options: options[pane], state: state[pane], children: children[pane] }
    ,    south:                false            // ditto
    ,    west:                false            // ditto
    ,    east:                false            // ditto
    ,    center:                false            // ditto
    };

    // create the border layout NOW
    if (_create() === 'cancel') // onload_start callback returned false to CANCEL layout creation
        return null;
    else // true OR false -- if layout-elements did NOT init (hidden or do not exist), can auto-init later
        return Instance; // return the Instance object

}


})( jQuery );
// END Layout - keep internal vars internal!



// START Plugins - shared wrapper, no global vars
(function ($) {


/**
 * jquery.layout.state 1.0
 * $Date: 2011-07-16 08:00:00 (Sat, 16 July 2011) $
 *
 * Copyright (c) 2012 
 *   Kevin Dalman (http://allpro.net)
 *
 * Dual licensed under the GPL (http://www.gnu.org/licenses/gpl.html)
 * and MIT (http://www.opensource.org/licenses/mit-license.php) licenses.
 *
 * @requires: UI Layout 1.3.0.rc30.1 or higher
 * @requires: $.ui.cookie (above)
 *
 * @see: http://groups.google.com/group/jquery-ui-layout
 */
/*
 *    State-management options stored in options.stateManagement, which includes a .cookie hash
 *    Default options saves ALL KEYS for ALL PANES, ie: pane.size, pane.isClosed, pane.isHidden
 *
 *    // STATE/COOKIE OPTIONS
 *    @example $(el).layout({
                stateManagement: {
                    enabled:    true
                ,    stateKeys:    "east.size,west.size,east.isClosed,west.isClosed"
                ,    cookie:        { name: "appLayout", path: "/" }
                }
            })
 *    @example $(el).layout({ stateManagement__enabled: true }) // enable auto-state-management using cookies
 *    @example $(el).layout({ stateManagement__cookie: { name: "appLayout", path: "/" } })
 *    @example $(el).layout({ stateManagement__cookie__name: "appLayout", stateManagement__cookie__path: "/" })
 *
 *    // STATE/COOKIE METHODS
 *    @example myLayout.saveCookie( "west.isClosed,north.size,south.isHidden", {expires: 7} );
 *    @example myLayout.loadCookie();
 *    @example myLayout.deleteCookie();
 *    @example var JSON = myLayout.readState();    // CURRENT Layout State
 *    @example var JSON = myLayout.readCookie();    // SAVED Layout State (from cookie)
 *    @example var JSON = myLayout.state.stateData;    // LAST LOADED Layout State (cookie saved in layout.state hash)
 *
 *    CUSTOM STATE-MANAGEMENT (eg, saved in a database)
 *    @example var JSON = myLayout.readState( "west.isClosed,north.size,south.isHidden" );
 *    @example myLayout.loadState( JSON );
 */

/**
 *    UI COOKIE UTILITY
 *
 *    A $.cookie OR $.ui.cookie namespace *should be standard*, but until then...
 *    This creates $.ui.cookie so Layout does not need the cookie.jquery.js plugin
 *    NOTE: This utility is REQUIRED by the layout.state plugin
 *
 *    Cookie methods in Layout are created as part of State Management 
 */
if (!$.ui) $.ui = {};
$.ui.cookie = {

    // cookieEnabled is not in DOM specs, but DOES works in all browsers,including IE6
    acceptsCookies: !!navigator.cookieEnabled

,    read: function (name) {
        var    c        = document.cookie
        ,    cs        = c ? c.split(';') : []
        ,    pair    // loop var
        ;
        for (var i=0, n=cs.length; i < n; i++) {
            pair = $.trim(cs[i]).split('='); // name=value pair
            if (pair[0] == name) // found the layout cookie
                return decodeURIComponent(pair[1]);
        }
        return null;
    }

,    write: function (name, val, cookieOpts) {
        var    params    = ""
        ,    date    = ""
        ,    clear    = false
        ,    o        = cookieOpts || {}
        ,    x        = o.expires  || null
        ,    t        = $.type(x)
        ;
        if (t === "date")
            date = x;
        else if (t === "string" && x > 0) {
            x = parseInt(x,10);
            t = "number";
        }
        if (t === "number") {
            date = new Date();
            if (x > 0)
                date.setDate(date.getDate() + x);
            else {
                date.setFullYear(1970);
                clear = true;
            }
        }
        if (date)        params += ";expires="+ date.toUTCString();
        if (o.path)        params += ";path="+ o.path;
        if (o.domain)    params += ";domain="+ o.domain;
        if (o.secure)    params += ";secure";
        document.cookie = name +"="+ (clear ? "" : encodeURIComponent( val )) + params; // write or clear cookie
    }

,    clear: function (name) {
        $.ui.cookie.write(name, "", {expires: -1});
    }

};
// if cookie.jquery.js is not loaded, create an alias to replicate it
// this may be useful to other plugins or code dependent on that plugin
if (!$.cookie) $.cookie = function (k, v, o) {
    var C = $.ui.cookie;
    if (v === null)
        C.clear(k);
    else if (v === undefined)
        return C.read(k);
    else
        C.write(k, v, o);
};


// tell Layout that the state plugin is available
$.layout.plugins.stateManagement = true;

//    Add State-Management options to layout.defaults
$.layout.config.optionRootKeys.push("stateManagement");
$.layout.defaults.stateManagement = {
    enabled:        false    // true = enable state-management, even if not using cookies
,    autoSave:        true    // Save a state-cookie when page exits?
,    autoLoad:        true    // Load the state-cookie when Layout inits?
,    animateLoad:    true    // animate panes when loading state into an active layout
,    includeChildren: true    // recurse into child layouts to include their state as well
    // List state-data to save - must be pane-specific
,    stateKeys:    "north.size,south.size,east.size,west.size,"+
                "north.isClosed,south.isClosed,east.isClosed,west.isClosed,"+
                "north.isHidden,south.isHidden,east.isHidden,west.isHidden"
,    cookie: {
        name:    ""    // If not specified, will use Layout.name, else just "Layout"
    ,    domain:    ""    // blank = current domain
    ,    path:    ""    // blank = current page, "/" = entire website
    ,    expires: ""    // 'days' to keep cookie - leave blank for 'session cookie'
    ,    secure:    false
    }
};
// Set stateManagement as a layout-option, NOT a pane-option
$.layout.optionsMap.layout.push("stateManagement");

/*
 *    State Management methods
 */
$.layout.state = {

    /**
     * Get the current layout state and save it to a cookie
     *
     * myLayout.saveCookie( keys, cookieOpts )
     *
     * @param {Object}            inst
     * @param {(string|Array)=}    keys
     * @param {Object=}            cookieOpts
     */
    saveCookie: function (inst, keys, cookieOpts) {
        var o    = inst.options
        ,    sm    = o.stateManagement
        ,    oC    = $.extend(true, {}, sm.cookie, cookieOpts || null)
        ,    data = inst.state.stateData = inst.readState( keys || sm.stateKeys ) // read current panes-state
        ;
        $.ui.cookie.write( oC.name || o.name || "Layout", $.layout.state.encodeJSON(data), oC );
        return $.extend(true, {}, data); // return COPY of state.stateData data
    }

    /**
     * Remove the state cookie
     *
     * @param {Object}    inst
     */
,    deleteCookie: function (inst) {
        var o = inst.options;
        $.ui.cookie.clear( o.stateManagement.cookie.name || o.name || "Layout" );
    }

    /**
     * Read & return data from the cookie - as JSON
     *
     * @param {Object}    inst
     */
,    readCookie: function (inst) {
        var o = inst.options;
        var c = $.ui.cookie.read( o.stateManagement.cookie.name || o.name || "Layout" );
        // convert cookie string back to a hash and return it
        return c ? $.layout.state.decodeJSON(c) : {};
    }

    /**
     * Get data from the cookie and USE IT to loadState
     *
     * @param {Object}    inst
     */
,    loadCookie: function (inst) {
        var c = $.layout.state.readCookie(inst); // READ the cookie
        if (c) {
            inst.state.stateData = $.extend(true, {}, c); // SET state.stateData
            inst.loadState(c); // LOAD the retrieved state
        }
        return c;
    }

    /**
     * Update layout options from the cookie, if one exists
     *
     * @param {Object}        inst
     * @param {Object=}        stateData
     * @param {boolean=}    animate
     */
,    loadState: function (inst, data, opts) {
        if (!$.isPlainObject( data ) || $.isEmptyObject( data )) return;

        // normalize data & cache in the state object
        data = inst.state.stateData = $.layout.transformData( data ); // panes = default subkey

        // add missing/default state-restore options
        var smo = inst.options.stateManagement;
        opts = $.extend({
            animateLoad:        false //smo.animateLoad
        ,    includeChildren:    smo.includeChildren
        }, opts );

        if (!inst.state.initialized) {
            /*
             *    layout NOT initialized, so just update its options
             */
            // MUST remove pane.children keys before applying to options
            // use a copy so we don't remove keys from original data
            var o = $.extend(true, {}, data);
            //delete o.center; // center has no state-data - only children
            $.each($.layout.config.allPanes, function (idx, pane) {
                if (o[pane]) delete o[pane].children;           
             });
            // update CURRENT layout-options with saved state data
            $.extend(true, inst.options, o);
        }
        else {
            /*
             *    layout already initialized, so modify layout's configuration
             */
            var noAnimate = !opts.animateLoad
            ,    o, c, h, state, open
            ;
            $.each($.layout.config.borderPanes, function (idx, pane) {
                o = data[ pane ];
                if (!$.isPlainObject( o )) return; // no key, skip pane

                s    = o.size;
                c    = o.initClosed;
                h    = o.initHidden;
                ar    = o.autoResize
                state    = inst.state[pane];
                open    = state.isVisible;

                // reset autoResize
                if (ar)
                    state.autoResize = ar;
                // resize BEFORE opening
                if (!open)
                    inst._sizePane(pane, s, false, false, false); // false=skipCallback/noAnimation/forceResize
                // open/close as necessary - DO NOT CHANGE THIS ORDER!
                if (h === true)            inst.hide(pane, noAnimate);
                else if (c === true)    inst.close(pane, false, noAnimate);
                else if (c === false)    inst.open (pane, false, noAnimate);
                else if (h === false)    inst.show (pane, false, noAnimate);
                // resize AFTER any other actions
                if (open)
                    inst._sizePane(pane, s, false, false, noAnimate); // animate resize if option passed
            });

            /*
             *    RECURSE INTO CHILD-LAYOUTS
             */
            if (opts.includeChildren) {
                var paneStateChildren, childState;
                $.each(inst.children, function (pane, paneChildren) {
                    paneStateChildren = data[pane] ? data[pane].children : 0;
                    if (paneStateChildren && paneChildren) {
                        $.each(paneChildren, function (stateKey, child) {
                            childState = paneStateChildren[stateKey];
                            if (child && childState)
                                child.loadState( childState );
                        });
                    }
                });
            }
        }
    }

    /**
     * Get the *current layout state* and return it as a hash
     *
     * @param {Object=}        inst    // Layout instance to get state for
     * @param {object=}        [opts]    // State-Managements override options
     */
,    readState: function (inst, opts) {
        // backward compatility
        if ($.type(opts) === 'string') opts = { keys: opts };
        if (!opts) opts = {};
        var    sm        = inst.options.stateManagement
        ,    ic        = opts.includeChildren
        ,    recurse    = ic !== undefined ? ic : sm.includeChildren
        ,    keys    = opts.stateKeys || sm.stateKeys
        ,    alt        = { isClosed: 'initClosed', isHidden: 'initHidden' }
        ,    state    = inst.state
        ,    panes    = $.layout.config.allPanes
        ,    data    = {}
        ,    pair, pane, key, val
        ,    ps, pC, child, array, count, branch
        ;
        if ($.isArray(keys)) keys = keys.join(",");
        // convert keys to an array and change delimiters from '__' to '.'
        keys = keys.replace(/__/g, ".").split(',');
        // loop keys and create a data hash
        for (var i=0, n=keys.length; i < n; i++) {
            pair = keys[i].split(".");
            pane = pair[0];
            key  = pair[1];
            if ($.inArray(pane, panes) < 0) continue; // bad pane!
            val = state[ pane ][ key ];
            if (val == undefined) continue;
            if (key=="isClosed" && state[pane]["isSliding"])
                val = true; // if sliding, then *really* isClosed
            ( data[pane] || (data[pane]={}) )[ alt[key] ? alt[key] : key ] = val;
        }

        // recurse into the child-layouts for each pane
        if (recurse) {
            $.each(panes, function (idx, pane) {
                pC = inst.children[pane];
                ps = state.stateData[pane];
                if ($.isPlainObject( pC ) && !$.isEmptyObject( pC )) {
                    // ensure a key exists for this 'pane', eg: branch = data.center
                    branch = data[pane] || (data[pane] = {});
                    if (!branch.children) branch.children = {};
                    $.each( pC, function (key, child) {
                        // ONLY read state from an initialize layout
                        if ( child.state.initialized )
                            branch.children[ key ] = $.layout.state.readState( child );
                        // if we have PREVIOUS (onLoad) state for this child-layout, KEEP IT!
                        else if ( ps && ps.children && ps.children[ key ] ) {
                            branch.children[ key ] = $.extend(true, {}, ps.children[ key ] );
                        }
                    });
                }
            });
        }

        return data;
    }

    /**
     *    Stringify a JSON hash so can save in a cookie or db-field
     */
,    encodeJSON: function (JSON) {
        return parse(JSON);
        function parse (h) {
            var D=[], i=0, k, v, t // k = key, v = value
            ,    a = $.isArray(h)
            ;
            for (k in h) {
                v = h[k];
                t = typeof v;
                if (t == 'string')        // STRING - add quotes
                    v = '"'+ v +'"';
                else if (t == 'object')    // SUB-KEY - recurse into it
                    v = parse(v);
                D[i++] = (!a ? '"'+ k +'":' : '') + v;
            }
            return (a ? '[' : '{') + D.join(',') + (a ? ']' : '}');
        };
    }

    /**
     *    Convert stringified JSON back to a hash object
     *    @see        $.parseJSON(), adding in jQuery 1.4.1
     */
,    decodeJSON: function (str) {
        try { return $.parseJSON ? $.parseJSON(str) : window["eval"]("("+ str +")") || {}; }
        catch (e) { return {}; }
    }


,    _create: function (inst) {
        var _    = $.layout.state
        ,    o    = inst.options
        ,    sm    = o.stateManagement
        ;
        //    ADD State-Management plugin methods to inst
         $.extend( inst, {
        //    readCookie - update options from cookie - returns hash of cookie data
            readCookie:        function () { return _.readCookie(inst); }
        //    deleteCookie
        ,    deleteCookie:    function () { _.deleteCookie(inst); }
        //    saveCookie - optionally pass keys-list and cookie-options (hash)
        ,    saveCookie:        function (keys, cookieOpts) { return _.saveCookie(inst, keys, cookieOpts); }
        //    loadCookie - readCookie and use to loadState() - returns hash of cookie data
        ,    loadCookie:        function () { return _.loadCookie(inst); }
        //    loadState - pass a hash of state to use to update options
        ,    loadState:        function (stateData, opts) { _.loadState(inst, stateData, opts); }
        //    readState - returns hash of current layout-state
        ,    readState:        function (keys) { return _.readState(inst, keys); }
        //    add JSON utility methods too...
        ,    encodeJSON:        _.encodeJSON
        ,    decodeJSON:        _.decodeJSON
        });

        // init state.stateData key, even if plugin is initially disabled
        inst.state.stateData = {};

        // autoLoad MUST BE one of: data-array, data-hash, callback-function, or TRUE
        if ( !sm.autoLoad ) return;

        //    When state-data exists in the autoLoad key USE IT,
        //    even if stateManagement.enabled == false
        if ($.isPlainObject( sm.autoLoad )) {
            if (!$.isEmptyObject( sm.autoLoad )) {
                inst.loadState( sm.autoLoad );
            }
        }
        else if ( sm.enabled ) {
            // update the options from cookie or callback
            // if options is a function, call it to get stateData
            if ($.isFunction( sm.autoLoad )) {
                var d = {};
                try {
                    d = sm.autoLoad( inst, inst.state, inst.options, inst.options.name || '' ); // try to get data from fn
                } catch (e) {}
                if (d && $.isPlainObject( d ) && !$.isEmptyObject( d ))
                    inst.loadState(d);
            }
            else // any other truthy value will trigger loadCookie
                inst.loadCookie();
        }
    }

,    _unload: function (inst) {
        var sm = inst.options.stateManagement;
        if (sm.enabled && sm.autoSave) {
            // if options is a function, call it to save the stateData
            if ($.isFunction( sm.autoSave )) {
                try {
                    sm.autoSave( inst, inst.state, inst.options, inst.options.name || '' ); // try to get data from fn
                } catch (e) {}
            }
            else // any truthy value will trigger saveCookie
                inst.saveCookie();
        }
    }

};

// add state initialization method to Layout's onCreate array of functions
$.layout.onCreate.push( $.layout.state._create );
$.layout.onUnload.push( $.layout.state._unload );




/**
 * jquery.layout.buttons 1.0
 * $Date: 2011-07-16 08:00:00 (Sat, 16 July 2011) $
 *
 * Copyright (c) 2012 
 *   Kevin Dalman (http://allpro.net)
 *
 * Dual licensed under the GPL (http://www.gnu.org/licenses/gpl.html)
 * and MIT (http://www.opensource.org/licenses/mit-license.php) licenses.
 *
 * @requires: UI Layout 1.3.0.rc30.1 or higher
 *
 * @see: http://groups.google.com/group/jquery-ui-layout
 *
 * Docs: [ to come ]
 * Tips: [ to come ]
 */

// tell Layout that the state plugin is available
$.layout.plugins.buttons = true;

//    Add buttons options to layout.defaults
$.layout.defaults.autoBindCustomButtons = false;
// Specify autoBindCustomButtons as a layout-option, NOT a pane-option
$.layout.optionsMap.layout.push("autoBindCustomButtons");

/*
 *    Button methods
 */
$.layout.buttons = {

    /**
    * Searches for .ui-layout-button-xxx elements and auto-binds them as layout-buttons
    *
    * @see  _create()
    *
    * @param  {Object}        inst    Layout Instance object
    */
    init: function (inst) {
        var pre        = "ui-layout-button-"
        ,    layout    = inst.options.name || ""
        ,    name;
        $.each("toggle,open,close,pin,toggle-slide,open-slide".split(","), function (i, action) {
            $.each($.layout.config.borderPanes, function (ii, pane) {
                $("."+pre+action+"-"+pane).each(function(){
                    // if button was previously 'bound', data.layoutName was set, but is blank if layout has no 'name'
                    name = $(this).data("layoutName") || $(this).attr("layoutName");
                    if (name == undefined || name === layout)
                        inst.bindButton(this, action, pane);
                });
            });
        });
    }

    /**
    * Helper function to validate params received by addButton utilities
    *
    * Two classes are added to the element, based on the buttonClass...
    * The type of button is appended to create the 2nd className:
    *  - ui-layout-button-pin        // action btnClass
    *  - ui-layout-button-pin-west    // action btnClass + pane
    *  - ui-layout-button-toggle
    *  - ui-layout-button-open
    *  - ui-layout-button-close
    *
    * @param {Object}            inst        Layout Instance object
    * @param {(string|!Object)}    selector    jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
    * @param {string}           pane         Name of the pane the button is for: 'north', 'south', etc.
    *
    * @return {Array.<Object>}    If both params valid, the element matching 'selector' in a jQuery wrapper - otherwise returns null
    */
,    get: function (inst, selector, pane, action) {
        var $E    = $(selector)
        ,    o    = inst.options
        ,    err    = o.errors.addButtonError
        ;
        if (!$E.length) { // element not found
            $.layout.msg(err +" "+ o.errors.selector +": "+ selector, true);
        }
        else if ($.inArray(pane, $.layout.config.borderPanes) < 0) { // invalid 'pane' sepecified
            $.layout.msg(err +" "+ o.errors.pane +": "+ pane, true);
            $E = $("");  // NO BUTTON
        }
        else { // VALID
            var btn = o[pane].buttonClass +"-"+ action;
            $E    .addClass( btn +" "+ btn +"-"+ pane )
                .data("layoutName", o.name); // add layout identifier - even if blank!
        }
        return $E;
    }


    /**
    * NEW syntax for binding layout-buttons - will eventually replace addToggle, addOpen, etc.
    *
    * @param {Object}            inst        Layout Instance object
    * @param {(string|!Object)}    selector    jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
    * @param {string}            action
    * @param {string}            pane
    */
,    bind: function (inst, selector, action, pane) {
        var _ = $.layout.buttons;
        switch (action.toLowerCase()) {
            case "toggle":            _.addToggle    (inst, selector, pane); break;    
            case "open":            _.addOpen    (inst, selector, pane); break;
            case "close":            _.addClose    (inst, selector, pane); break;
            case "pin":                _.addPin    (inst, selector, pane); break;
            case "toggle-slide":    _.addToggle    (inst, selector, pane, true); break;    
            case "open-slide":        _.addOpen    (inst, selector, pane, true); break;
        }
        return inst;
    }

    /**
    * Add a custom Toggler button for a pane
    *
    * @param {Object}            inst        Layout Instance object
    * @param {(string|!Object)}    selector    jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
    * @param {string}              pane         Name of the pane the button is for: 'north', 'south', etc.
    * @param {boolean=}            slide         true = slide-open, false = pin-open
    */
,    addToggle: function (inst, selector, pane, slide) {
        $.layout.buttons.get(inst, selector, pane, "toggle")
            .click(function(evt){
                inst.toggle(pane, !!slide);
                evt.stopPropagation();
            });
        return inst;
    }

    /**
    * Add a custom Open button for a pane
    *
    * @param {Object}            inst        Layout Instance object
    * @param {(string|!Object)}    selector    jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
    * @param {string}            pane         Name of the pane the button is for: 'north', 'south', etc.
    * @param {boolean=}            slide         true = slide-open, false = pin-open
    */
,    addOpen: function (inst, selector, pane, slide) {
        $.layout.buttons.get(inst, selector, pane, "open")
            .attr("title", inst.options[pane].tips.Open)
            .click(function (evt) {
                inst.open(pane, !!slide);
                evt.stopPropagation();
            });
        return inst;
    }

    /**
    * Add a custom Close button for a pane
    *
    * @param {Object}            inst        Layout Instance object
    * @param {(string|!Object)}    selector    jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
    * @param {string}           pane         Name of the pane the button is for: 'north', 'south', etc.
    */
,    addClose: function (inst, selector, pane) {
        $.layout.buttons.get(inst, selector, pane, "close")
            .attr("title", inst.options[pane].tips.Close)
            .click(function (evt) {
                inst.close(pane);
                evt.stopPropagation();
            });
        return inst;
    }

    /**
    * Add a custom Pin button for a pane
    *
    * Four classes are added to the element, based on the paneClass for the associated pane...
    * Assuming the default paneClass and the pin is 'up', these classes are added for a west-pane pin:
    *  - ui-layout-pane-pin
    *  - ui-layout-pane-west-pin
    *  - ui-layout-pane-pin-up
    *  - ui-layout-pane-west-pin-up
    *
    * @param {Object}            inst        Layout Instance object
    * @param {(string|!Object)}    selector    jQuery selector (or element) for button, eg: ".ui-layout-north .toggle-button"
    * @param {string}           pane         Name of the pane the pin is for: 'north', 'south', etc.
    */
,    addPin: function (inst, selector, pane) {
        var    _    = $.layout.buttons
        ,    $E    = _.get(inst, selector, pane, "pin");
        if ($E.length) {
            var s = inst.state[pane];
            $E.click(function (evt) {
                _.setPinState(inst, $(this), pane, (s.isSliding || s.isClosed));
                if (s.isSliding || s.isClosed) inst.open( pane ); // change from sliding to open
                else inst.close( pane ); // slide-closed
                evt.stopPropagation();
            });
            // add up/down pin attributes and classes
            _.setPinState(inst, $E, pane, (!s.isClosed && !s.isSliding));
            // add this pin to the pane data so we can 'sync it' automatically
            // PANE.pins key is an array so we can store multiple pins for each pane
            s.pins.push( selector ); // just save the selector string
        }
        return inst;
    }

    /**
    * Change the class of the pin button to make it look 'up' or 'down'
    *
    * @see  addPin(), syncPins()
    *
    * @param {Object}            inst    Layout Instance object
    * @param {Array.<Object>}    $Pin    The pin-span element in a jQuery wrapper
    * @param {string}            pane    These are the params returned to callbacks by layout()
    * @param {boolean}            doPin    true = set the pin 'down', false = set it 'up'
    */
,    setPinState: function (inst, $Pin, pane, doPin) {
        var updown = $Pin.attr("pin");
        if (updown && doPin === (updown=="down")) return; // already in correct state
        var
            o        = inst.options[pane]
        ,    pin        = o.buttonClass +"-pin"
        ,    side    = pin +"-"+ pane
        ,    UP        = pin +"-up "+    side +"-up"
        ,    DN        = pin +"-down "+side +"-down"
        ;
        $Pin
            .attr("pin", doPin ? "down" : "up") // logic
            .attr("title", doPin ? o.tips.Unpin : o.tips.Pin)
            .removeClass( doPin ? UP : DN ) 
            .addClass( doPin ? DN : UP ) 
        ;
    }

    /**
    * INTERNAL function to sync 'pin buttons' when pane is opened or closed
    * Unpinned means the pane is 'sliding' - ie, over-top of the adjacent panes
    *
    * @see  open(), close()
    *
    * @param {Object}            inst    Layout Instance object
    * @param {string}    pane    These are the params returned to callbacks by layout()
    * @param {boolean}    doPin    True means set the pin 'down', False means 'up'
    */
,    syncPinBtns: function (inst, pane, doPin) {
        // REAL METHOD IS _INSIDE_ LAYOUT - THIS IS HERE JUST FOR REFERENCE
        $.each(inst.state[pane].pins, function (i, selector) {
            $.layout.buttons.setPinState(inst, $(selector), pane, doPin);
        });
    }


,    _load: function (inst) {
        var    _    = $.layout.buttons;
        // ADD Button methods to Layout Instance
        // Note: sel = jQuery Selector string
        $.extend( inst, {
            bindButton:        function (sel, action, pane) { return _.bind(inst, sel, action, pane); }
        //    DEPRECATED METHODS
        ,    addToggleBtn:    function (sel, pane, slide) { return _.addToggle(inst, sel, pane, slide); }
        ,    addOpenBtn:        function (sel, pane, slide) { return _.addOpen(inst, sel, pane, slide); }
        ,    addCloseBtn:    function (sel, pane) { return _.addClose(inst, sel, pane); }
        ,    addPinBtn:        function (sel, pane) { return _.addPin(inst, sel, pane); }
        });

        // init state array to hold pin-buttons
        for (var i=0; i<4; i++) {
            var pane = $.layout.config.borderPanes[i];
            inst.state[pane].pins = [];
        }

        // auto-init buttons onLoad if option is enabled
        if ( inst.options.autoBindCustomButtons )
            _.init(inst);
    }

,    _unload: function (inst) {
        // TODO: unbind all buttons???
    }

};

// add initialization method to Layout's onLoad array of functions
$.layout.onLoad.push(  $.layout.buttons._load );
//$.layout.onUnload.push( $.layout.buttons._unload );



/**
 * jquery.layout.browserZoom 1.0
 * $Date: 2011-12-29 08:00:00 (Thu, 29 Dec 2011) $
 *
 * Copyright (c) 2012 
 *   Kevin Dalman (http://allpro.net)
 *
 * Dual licensed under the GPL (http://www.gnu.org/licenses/gpl.html)
 * and MIT (http://www.opensource.org/licenses/mit-license.php) licenses.
 *
 * @requires: UI Layout 1.3.0.rc30.1 or higher
 *
 * @see: http://groups.google.com/group/jquery-ui-layout
 *
 * TODO: Extend logic to handle other problematic zooming in browsers
 * TODO: Add hotkey/mousewheel bindings to _instantly_ respond to these zoom event
 */

// tell Layout that the plugin is available
$.layout.plugins.browserZoom = true;

$.layout.defaults.browserZoomCheckInterval = 1000;
$.layout.optionsMap.layout.push("browserZoomCheckInterval");

/*
 *    browserZoom methods
 */
$.layout.browserZoom = {

    _init: function (inst) {
        // abort if browser does not need this check
        if ($.layout.browserZoom.ratio() !== false)
            $.layout.browserZoom._setTimer(inst);
    }

,    _setTimer: function (inst) {
        // abort if layout destroyed or browser does not need this check
        if (inst.destroyed) return;
        var o    = inst.options
        ,    s    = inst.state
        //    don't need check if inst has parentLayout, but check occassionally in case parent destroyed!
        //    MINIMUM 100ms interval, for performance
        ,    ms    = inst.hasParentLayout ?  5000 : Math.max( o.browserZoomCheckInterval, 100 )
        ;
        // set the timer
        setTimeout(function(){
            if (inst.destroyed || !o.resizeWithWindow) return;
            var d = $.layout.browserZoom.ratio();
            if (d !== s.browserZoom) {
                s.browserZoom = d;
                inst.resizeAll();
            }
            // set a NEW timeout
            $.layout.browserZoom._setTimer(inst);
        }
        ,    ms );
    }

,    ratio: function () {
        var w    = window
        ,    s    = screen
        ,    d    = document
        ,    dE    = d.documentElement || d.body
        ,    b    = $.layout.browser
        ,    v    = b.version
        ,    r, sW, cW
        ;
        // we can ignore all browsers that fire window.resize event onZoom
        if ((b.msie && v > 8)
        ||    !b.msie
        ) return false; // don't need to track zoom

        if (s.deviceXDPI && s.systemXDPI) // syntax compiler hack
            return calc(s.deviceXDPI, s.systemXDPI);
        // everything below is just for future reference!
        if (b.webkit && (r = d.body.getBoundingClientRect))
            return calc((r.left - r.right), d.body.offsetWidth);
        if (b.webkit && (sW = w.outerWidth))
            return calc(sW, w.innerWidth);
        if ((sW = s.width) && (cW = dE.clientWidth))
            return calc(sW, cW);
        return false; // no match, so cannot - or don't need to - track zoom

        function calc (x,y) { return (parseInt(x,10) / parseInt(y,10) * 100).toFixed(); }
    }

};
// add initialization method to Layout's onLoad array of functions
$.layout.onReady.push( $.layout.browserZoom._init );


})( jQuery );