ImpressCMS/impresscms

/**
* Stylesheet toggle variation on styleswitch stylesheet switcher.
* Built on jQuery.
* Under an CC Attribution, Share Alike License.
* By Kelvin Luck ( http://www.kelvinluck.com/ )
**/

(function($)
    {
        // Local vars for toggle
        var availableStylesheets = [];
        var activeStylesheetIndex = 0;
        
        // To loop through available stylesheets
        $.stylesheetToggle = function()
        {
            activeStylesheetIndex ++;
            activeStylesheetIndex %= availableStylesheets.length;
            $.stylesheetSwitch(availableStylesheets[activeStylesheetIndex]);
        };
        
        // To switch to a specific named stylesheet
        $.stylesheetSwitch = function(styleName)
        {
            $('link[rel*=style][title]').each(
                function(i) 
                {
                    this.disabled = true;
                    if (this.getAttribute('title') == styleName) {
                        this.disabled = false;
                        activeStylesheetIndex = i;
                    }
                }
            );
            createCookie('style', styleName, 365);
        };
        
        // To initialise the stylesheet with it's 
        $.stylesheetInit = function()
        {
            $('link[rel*=style][title]').each(
                function(i) 
                {
                    availableStylesheets.push(this.getAttribute('title'));
                }
            );
            var c = readCookie('style');
            if (c) {
                $.stylesheetSwitch(c);
            }
        };
    }
)(jQuery);

// cookie functions http://www.quirksmode.org/js/cookies.html
function createCookie(name,value,days)
{
    if (days)
    {
        var date = new Date();
        date.setTime(date.getTime()+(days*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
    }
    else var expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}
function readCookie(name)
{
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++)
    {
        var c = ca[i];
        while (c.charAt(0)==' ') c = c.substring(1,c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
    }
    return null;
}
function eraseCookie(name)
{
    createCookie(name,"",-1);
}
// /cookie functions