/**
* Multiple Selects - jQuery plugin for converting a multiple <select> into two, adding the ability to move items between the boxes.
* http://code.google.com/p/jqmultiselects/
*
* Copyright (c) 2007 Rob Desbois
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*
* Version: 0.3
*
* Edit by INIT
**/

jQuery.fn.multiSelect = function(to, options) {
	// support v0.1 syntax
	if (typeof options == "string")
		options = {trigger: "#"+options};
	
	options = $.extend({
		trigger: null,		// selector of elements whose 'click' event should invoke a move
		triggerAll: null,	// selector of elements whose 'click' event should invoke a move all
		sortOptions: true,	// true => sort options to keep them in the same order
		autoSubmit: true,	// true => select all child <option>s on parent form submit (if any)
		beforeMove: null,	// before move callback function
		afterMove: null		// after move callback
	}, options);

	// for closures
	var $select = this;
	
	// make form submission select child <option>s
	if (options.autoSubmit)
		this.parents("form").submit(function() { selectChildOptions($select); });

	// sort the two selects
	if(options.sortOptions) {
		$select.sortOptions();
		$(to).sortOptions();
	}

	// create the closure
	var moveFunction = function() { moveOptions($select, to, options.beforeMove, options.afterMove, options.sortOptions, false); };
	var moveAllFunction = function() { moveOptions($select, to, options.beforeMove, options.afterMove, options.sortOptions, true); };
	
	// attach double-click behaviour
	this.dblclick(moveFunction);
	
	// trigger element behaviour
	if (options.trigger)
		jQuery(options.trigger).click(moveFunction);
	if (options.triggerAll)
		jQuery(options.triggerAll).click(moveAllFunction);
	
	return this;


	// moves the options
	function moveOptions(from, toSel, beforeMove, afterMove, sortOptions, moveAll) {
		if (beforeMove && !beforeMove())
			return;

		var optionSelector = "option:selected";
		if(moveAll) {
			optionSelector = "option";
		}

		jQuery(optionSelector, from).each(function() {
			jQuery(this)
				.attr("selected", false)
				.appendTo(toSel);
		});

		// sort both selects
		if(sortOptions) {
			from.sortOptions();
			$(toSel).sortOptions();
		}
		
		afterMove && afterMove();
   }
	
	
	// selects all child options
	function selectChildOptions($select) {
		 if ($select.attr("id") == "eligibilities"){ // edit by INIT
			$select.children("option").each(function() {
				this.selected = true;
			});
		}
	}

};

/**
 * Sort options (ascending or descending) in a select box (or series of select boxes)
 *
 * @name     sortOptions
 * @author   Sam Collett (http://www.texotela.co.uk)
 * @type     jQuery
 * @param    Boolean ascending   (optional) Sort ascending (true/undefined), or descending (false)
 * @example  // ascending
 * $("#myselect").sortOptions(); // or $("#myselect").sortOptions(true);
 * @example  // descending
 * $("#myselect").sortOptions(false);
 *
 */
jQuery.fn.sortOptions = function(ascending) {
	var a = typeof(ascending) == "undefined" ? true : !!ascending;
	this.each(
		function() {
			if(this.nodeName.toLowerCase() != "select") return;
			// get options
			var o = this.options;
			// get number of options
			var oL = o.length;
			// create an array for sorting
			var sA = [];
			// loop through options, adding to sort array
			for(var i = 0; i<oL; i++) {
				sA[i] = {
					v: o[i].value,
					t: o[i].text
				}
			}
			// sort items in array based on option text
			sA.sort(
				function(o1, o2) {
					// option text is made lowercase for case insensitive sorting
					o1t = o1.t.toLowerCase(), o2t = o2.t.toLowerCase();
					// if options are the same, no sorting is needed
					if(o1t == o2t) return 0;
					if(a) {
						return o1t < o2t ? -1 : 1;
					} else {
						return o1t > o2t ? -1 : 1;
					}
				}
			);
			// change the options to match the sort array
			for(var i = 0; i<oL; i++) {
				o[i].text = sA[i].t;
				o[i].value = sA[i].v;
			}
		}
	);
	return this;
};


/**
 * Select adjust width
 *  - Set width of the two select boxes to the bigger of the two
 * @name     selectAdjustWidth
 * @author   Ying Zhang (http://pure-essence.net)
 * @type     jQuery
 *
 */
jQuery.fn.selectAdjustWidth = function(otherSelect) {
	var thisSelectElement = $(this)[0];
	var otherSelectObject = $(otherSelect);
	var otherSelectElement = $(otherSelectObject)[0];

	// get the bigger of the two
	var biggerWidth = thisSelectElement.offsetWidth;
	if(otherSelectElement.offsetWidth > biggerWidth) {
		biggerWidth = otherSelectElement.offsetWidth;
	}
	// set width to both
	$(this).width(biggerWidth);
	$(otherSelectObject).width(biggerWidth);

	return this;
};