/* 



	List Expander 

	written by Alen Grakalic, provided by Css Globe (cssglobe.com)

	

*/

 

this.listexpander = function(){

	

	// edit 

	

	var expandTo = 1; // level up to which you want your lists to be initially expanded. 1 is minimum

	// var expandText = "Expand All"; // text for expand all button

	//var collapseText = "Collapse All"; // text for collapse all button		

	var listClass = "listexpander" // class name that you want to assign to list(s). If you wish to change it make sure to update the css file as well  

	

	// end edit (do not edit below this line)

	

	this.start = function(){

		var ul = document.getElementsByTagName("ul");

		for (var i=0;i<ul.length;i++){

			if(ul[i].className == listClass){

				create(ul[i]);

				buttons(ul[i])

			};

		};

	};



	this.create = function(list) {	

		var items = list.getElementsByTagName("li");

		for(var i=0;i<items.length;i++){

			listItem(items[i]);

		};

	};	



	this.listItem = function(li){

		if(li.getElementsByTagName("ul").length > 0){

			var ul = li.getElementsByTagName("ul")[0];

			ul.style.display = (depth(ul) <= expandTo) ? "block" : "none";

			li.className = (depth(ul) <= expandTo) ? "expanded" : "collapsed";

			li.over = true;	

			ul.onmouseover = function(){li.over = false;} 

			ul.onmouseout = function(){li.over = true;} 

			li.onclick = function(){

				if(this.over){

					ul.style.display = (ul.style.display == "none") ? "block" : "none";

					this.className = (ul.style.display == "none") ? "collapsed" : "expanded";				

				};

			};

		};		

	};	

	

	this.buttons = function(list){

		var parent = list.parentNode;

		var p = document.createElement("p");

		p.className = listClass;

		var a = document.createElement("a");

		a.innerHTML = expandText;

		a.onclick = function(){expand(list)};

		p.appendChild(a);

		var a = document.createElement("a");

		a.innerHTML = collapseText;

		a.onclick = function(){collapse(list)};

		p.appendChild(a);

		parent.insertBefore(p,list);

	};

	

	this.expand = function(list){

		li = list.getElementsByTagName("li");

		for(var i=0;i<li.length;i++){

			if(li[i].getElementsByTagName("ul").length > 0){

				var ul = li[i].getElementsByTagName("ul")[0];

				ul.style.display = "block";

				li[i].className = "expanded";

			};

		};

	};

	

	this.collapse = function(list){

		li = list.getElementsByTagName("li");

		for(var i=0;i<li.length;i++){

			if(li[i].getElementsByTagName("ul").length > 0){

				var ul = li[i].getElementsByTagName("ul")[0];

				ul.style.display = "none";

				li[i].className = "collapsed";

			};

		};

	};

	

	this.depth = function(obj){

		var level = 1;

		while(obj.parentNode.className != listClass){

			if (obj.tagName == "UL") level++;

			obj = obj.parentNode;

		};

		return level;

	};	

	

	start();

	

};



window.onload = listexpander;