Strimoid/Strimoid

/*
 *     Character Count Plugin - jQuery plugin
 *     Dynamic character count for text areas and input fields
 *    written by Alen Grakalic
 *    http://cssglobe.com/post/7161/jquery-plugin-simplest-twitterlike-dynamic-character-count-for-textareas
 *
 *    Copyright (c) 2009 Alen Grakalic (http://cssglobe.com)
 *    Dual licensed under the MIT (MIT-LICENSE.txt)
 *    and GPL (GPL-LICENSE.txt) licenses.
 *
 *    Built for jQuery library
 *    http://jquery.com
 *
 */

(function ($) {

  $.fn.charCount = function (options) {

    // default configuration properties
    var defaults = {
      allowed: 140,
      warning: 25,
      css: 'counter',
      counterElement: 'span',
      cssWarning: 'warning',
      cssExceeded: 'exceeded',
      counterText: ''
    }

    var options = $.extend(defaults, options)

    function calculate (obj) {
      var count = $(obj).val().length
      var available = options.allowed - count
      if (available <= options.warning && available >= 0) {
        $(obj).next().addClass(options.cssWarning)
      } else {
        $(obj).next().removeClass(options.cssWarning)
      }
      if (available < 0) {
        $(obj).next().addClass(options.cssExceeded)
      } else {
        $(obj).next().removeClass(options.cssExceeded)
      }
      $(obj).next().html(options.counterText + available)
    }

    this.each(function () {
      $(this).after('<' + options.counterElement + ' class="' + options.css + '">' + options.counterText + '</' + options.counterElement + '>')
      calculate(this)
      $(this).keyup(function () {calculate(this)})
      $(this).change(function () {calculate(this)})
    })

  }

})(jQuery)