/* 

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

*/

this.listexpander = function(){

// edit 

var expandTo = 2; // 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;