// JavaScript Document
// the variable domain sets the id of the element for the script to look inside of to find the elements to apply classes and actions to.
// in other words, this is the div that contains the navigation lists.
var domain="dhs_left_menu";

function initiate() {
	items=document.getElementById(domain).getElementsByTagName('li');
	for (i=0;i<items.length;i++) {
		items[i].id="nav_item"+i;
		var addstuff=items[i].getElementsByTagName("ul");
		if (addstuff.length>0) {
			addstuff[0].id="subNav"+i;
			items[i].getElementsByTagName("a")[0].onclick= new Function("toggle('subNav"+i+"');");
			items[i].getElementsByTagName("a")[0].className="closed_item";
			addstuff[0].style.display="none";
		} else {
			items[i].getElementsByTagName("a")[0].className="normal_item";
		}
	}
	setCurrentPage()
}
function setCurrentPage() {
	var loc=window.location.href;
	var links=document.getElementById(domain).getElementsByTagName("a");
	if (links&&links.length) {
		for (i=0; i<links.length; i++) {
			if (links[i].href) {
				if (links[i].href.indexOf("#")==-1) {
					if (loc.indexOf(links[i].getAttribute('href'))>-1) {
						links[i].className="current_item";
						openpath(links[i]);
					}
				}
			}
		}
	}
}
function openpath(which) {
	for (elcon=which; elcon.id!=domain; elcon=elcon.parentNode) {
		if (elcon.tagName=="UL") {
			if (elcon.style.display=="none") {
				elcon.style.display="block";
			}
		}
	}
}
function toggle(which) {
var togList=document.getElementById(which);
	if (togList.style.display=="none") {
		togList.style.display="block";
		togList.parentNode.getElementsByTagName("a")[0].className="open_item";
	} else {
		togList.style.display="none";
		togList.parentNode.getElementsByTagName("a")[0].className="closed_item";
	}
}

function hassub(which) {
	var hassubvar=document.getElementById(which).getElementsByTagName("ul");
	if (hassubvar.length>0) {
		alert(hassubvar[1].tagName);
	}
}
function addEvent( obj, type, fn ) {
	if (obj.addEventListener) {
		obj.addEventListener( type, fn, false );
		EventCache.add(obj, type, fn);
	}
	else if (obj.attachEvent) {
		obj["e"+type+fn] = fn;
		obj[type+fn] = function() { obj["e"+type+fn]( window.event ); }
		obj.attachEvent( "on"+type, obj[type+fn] );
		EventCache.add(obj, type, fn);
	}
	else {
		obj["on"+type] = obj["e"+type+fn];
	}
}

var EventCache = function(){
	var listEvents = [];
	return {
		listEvents : listEvents,
		add : function(node, sEventName, fHandler){
			listEvents.push(arguments);
		},
		flush : function(){
			var i, item;
			for(i = listEvents.length - 1; i >= 0; i = i - 1){
				item = listEvents[i];
				if(item[0].removeEventListener){
					item[0].removeEventListener(item[1], item[2], item[3]);
				};
				if(item[1].substring(0, 2) != "on"){
					item[1] = "on" + item[1];
				};
				if(item[0].detachEvent){
					item[0].detachEvent(item[1], item[2]);
				};
				item[0][item[1]] = null;
			};
		}
	};
}();
addEvent(window,'unload',EventCache.flush);
addEvent(window,'load',initiate);