var Tree = {
	lft:null,
	rgt:null,
	el:null,
	selected:null,
	nodeText:null,
	clonedNode:null,
	cutting:null,
	timer:null,
	deleted:null,
	count_depth:0,
	init:function(){
		this.setLftRgt();
		this.el = this.$('tree').getElementsByTagName('a');
		for(var i=0;i<this.el.length;i++){
			this.el[i].parentNode.onclick = function(e){
				Tree.stopBubbling(e);
				if(this.getAttribute("nodeDisabled")=='true') return;
				if(this.id=='t1' || this.id=='t2') return;
				Tree.collapseNode(this);
				this.focus();
			}
		}
		this.openUrl();
	},
	openUrl:function(){
		var loc = location.href.substr(location.href.lastIndexOf('/')+1,location.href.length);
		if(loc.lastIndexOf('?')>0) loc = loc.substr(0,loc.lastIndexOf('?'));
		for(var i=0;i<this.el.length;i++){
			if(this.el[i].href.substr(this.el[i].href.lastIndexOf('/')+1,this.el[i].href.length)==loc){
				Tree.openNodeRecursive(this.el[i].parentNode);
				this.el[i].className = 'menuon';
				break;
			}
		}
	},
	getDepth:function(node,e){
		var count =0;
		while(node = node.parentNode){
			if(node.getAttribute("id")=='tree') break;
			if(node.nodeName=='UL'){
				count++;
			}
			node = node.parentNode;
		}
		return count;
	},
	getParent:function(node){
		var obj = node;
		do{
			if(node.getAttribute("id")=='tree') break;
			if(node.nodeName=='LI' && node.id!='t1'){
				obj.setAttribute("parent",node.getAttribute("id"));
			}
		
		} while(node = node.parentNode);
	},
	resetBackGroundColor:function(obj){
		for(var j=0;j<Tree.el.length;j++){
			if(Tree.el[j]!=obj)
				Tree.el[j].style.backgroundColor = 'transparent';
		}
	},
	nodeDisabled:function(nodes /** array **/){
		for(var i=0;i<nodes.length;i++){
			if(nodes[i]!='t1')
				this.setOpacity(this.$(nodes[i]),50);
			this.$(nodes[i]).setAttribute("nodeDisabled","true");
			this.$(nodes[i]).firstChild.style.cursor = 'text!important';
		}
	},
	collapse:function(){
		var li = this.$('tree').getElementsByTagName('li');
		for(var i=0;i<li.length;i++){
			this.collapseNode(li[i]);
		}
		this.collapseNode(li[0]);
	},
	doNode:function(node){
		if(node.previousSibling){ 
			Tree.lft = parseInt(node.previousSibling.getAttribute("rgt"))+1;
		} 
		var lft = Tree.lft;
		var rgt = Tree.rgt;
		rgt = (Tree.lft+(node.getElementsByTagName('li').length*2))+1;
		node.setAttribute("lft",lft);
		node.setAttribute("rgt",rgt);
		Tree.lft++;
	},
	setLftRgt:function(){
		var li = this.$('tree').getElementsByTagName('li');
		Tree.lft = 1;
		Tree.rgt = li.length*2;
		for(var k=0;k<li.length;k++){
			Tree.doNode(li[k]);
		}
	},
	collapseNode:function(obj){
		var node = obj;
		for(var i=0;i<node.childNodes.length;i++){
			if(node.childNodes.item(i).nodeName=="UL"){
				node.childNodes.item(i).style.display = Tree.getCurrentStyle(node.childNodes.item(i),'display')=='block'?'none':'block';
				Tree.getANode(obj);
				
			}
		}
	},
	openNode:function(obj){
		var node = obj;
		if(node.id=='t1' || node.id=='t2') return;
		if(obj.className!='folder_closed') return;
		for(var i=0;i<node.childNodes.length;i++){
			//alert(node.childNodes.item(i).nodeName);
			if(node.childNodes.item(i).nodeName=="UL"){
				node.childNodes.item(i).style.display = 'block';
				Tree.getANode(obj);
				return;
				
			}
		}
	},
	openNodeRecursive:function(obj){
		var node = obj;
		for(var i=0;i<node.childNodes.length;i++){
			//alert(node.childNodes.item(i).nodeName);
			if(node.childNodes.item(i).nodeName=="UL"){
				node.childNodes.item(i).style.display = 'block';
				Tree.getANode(obj);
			}
		}
		while(obj.parentNode){
			if(obj.nodeName=='UL'){
				obj.style.display = 'block';
				
			}
			if(obj.nodeName=='LI'){
				if(obj.className != '')
					obj.className = 'folder';
			}
			obj = obj.parentNode;
		}
	},
	getANode:function(obj){
		obj.className = obj.className=='folder_closed'?'folder':'folder_closed';
	},
	$:function(){
		return document.getElementById(arguments[0]);
	},
	stopBubbling:function(e){
		if (!e) var e = window.event;
		e.cancelBubble = true;
		if (e.stopPropagation) e.stopPropagation();
	},
	getCurrentStyle:function(obj,prop){
		return document.defaultView?document.defaultView.getComputedStyle(obj,null).getPropertyValue(prop):
		obj.currentStyle[prop];
	}
}