/*
 * DO NOT REMOVE THIS NOTICE
 *
 * PROJECT:   mygosuMenu
 * VERSION:   1.2.0
 * COPYRIGHT: (c) 2003,2004 Cezary Tomczak
 * LINK:      http://gosu.pl/dhtml/mygosumenu.html
 * LICENSE:   BSD (revised)
 */

function TreeMenu(id, selectedElement) {

    this.init = function() {
        if (!document.getElementById(this.id)) {
            alert("Element '"+this.id+"' does not exist in this document. TreeMenu cannot be initialized");
            return;
        }
        this.parse(document.getElementById(this.id).childNodes, this.tree, this.id);
		
		if (selectedElement)
		{
			this.selectTreeMenu(selectedElement);
		}
	}

    this.parse = function(nodes, tree, id) {
        for (var i = 0; i < nodes.length; i++) {
            if (nodes[i].nodeType != 1) {
                continue;
            }
            if (nodes[i].tagName.toLowerCase() == "li") {
				
                nodes[i].id = id + "-" + tree.length;
                tree[tree.length] = new Array();
                if (nodes[i].childNodes && this.hasUl(nodes[i].childNodes)) {
                    nodes[i].className = "section";
					
                    var a;
                    if (a = this.getA(nodes[i].childNodes)) {

						eval("document.getElementById('"+nodes[i].id +"').onclick = function() {"+
							"self.click('"+nodes[i].id+"');"+
						"}; ");
                    }
                } else {
                    nodes[i].className = "box";
                }
            }
            if (nodes[i].tagName.toLowerCase() == "ul") {
                nodes[i].style.display = "none";
                id = id + "-" + (tree.length - 1);
                nodes[i].id = id + "-section";
                tree = tree[tree.length - 1];
            }
            if (nodes[i].childNodes) {
                this.parse(nodes[i].childNodes, tree, id);
            }
        }
    }

    this.hasUl = function(nodes) {
        for (var i = 0; i < nodes.length; i++) {
            if (nodes[i].nodeType != 1) {
                continue;
            }
            if (nodes[i].tagName.toLowerCase() == "ul") {
                return true;
            }
            if (nodes[i].childNodes) {
                if (this.hasUl(nodes[i].childNodes)) {
                    return true;
                }
            }
        }
        return false;
    }

    this.getA = function(nodes) {
        for (var i = 0; i < nodes.length; i++) {
            if (nodes[i].nodeType == 1) {
                if (nodes[i].tagName.toLowerCase() == "a") {
                    return nodes[i];
                }
                return false;
            }
        }
    }
	
    this.click = function(id) {
        e1 = document.getElementById(id + "-section");
        e2 = document.getElementById(id);
        if (e1.style.display == "none") {
			
			if (ie6) {
				e2.style['background'] = 'url("images/tree-node-open.gif") no-repeat 0px 3px';
				e2.style.display = '';
			}
			else e2.className = "section-open";
			
			e1.style.display = "";
			
        } else {
			
			if (ie6) {
				e2.style['background'] = 'url("images/tree-node.gif") no-repeat 0px 3px';
				e2.style.display = '';
				
			}
			else e2.className = "section";
			
			e1.style.display = "none";
            
        }
    }
	
	this.selectTreeMenu = function(element)
	{
		var parentNode = element.parentNode;
		
		if (parentNode)
		{
			if(parentNode.nodeName.toLowerCase() == 'li' && parentNode.className == 'section')
			{
				if (ie6) {
					parentNode.style['background'] = 'url("images/tree-node-open.gif") no-repeat 0px 3px';
					parentNode.style.display = '';
				}
				else parentNode.className = 'section-open';
			}
			
			if(parentNode.id != 'menu1')
			{
				if(parentNode.nodeName.toLowerCase() == 'ul')
				{
					parentNode.style.display = '';
				}
				this.selectTreeMenu(parentNode);
			}
		}
	}

    var self = this;
    this.id = id;
    this.tree = new Array();
    this.init();
}