// JavaScript Document

/* tree menu - written by Sam Lai */

var persistmenu="yes" //"yes" or "no". Make sure each SPAN content contains an incrementing ID starting at 1 (id="sub1", id="sub2", etc)
var persisttype="sitewide" //enter "sitewide" for menu to persist across site, "local" for this page only

/*if (document.getElementById){
	document.write('<style type="text/css">\n')
	document.write('.submenu{display: none;}\n')
	document.write('</style>\n')
}*/

var collapseothers = true; 

var plusimg = new Image();
var minusimg = new Image();

plusimg.src = "images/plus.gif";
minusimg.src = "images/minus.gif";

/*if (document.getElementById){ //DynamicDrive.com change
document.write('<style type="text/css">\n')
document.write('.submenu{display: none;}\n')
document.write('</style>\n')
}*/

function SwitchMenu(obj, icon){
	if ( document.getElementById(obj) ) {
		if(document.getElementById){
		var el = document.getElementById(obj);
		var ar = document.getElementById("masterdiv").getElementsByTagName("ul"); 
		var icn = document.getElementById(icon).getElementsByTagName("img");
		var icns = document.getElementById("masterdiv").getElementsByTagName("span"); 
			if(el.style.display != "block"){
				if (collapseothers) {
					for (var i=0; i<ar.length; i++){
						if (ar[i].className=="submenu")
						ar[i].style.display = "none";
					}
					for (var i=0; i<icns.length; i++){
						tmp = icns[i].getElementsByTagName("img");
						if (icns[i].nextSibling.nextSibling.nextSibling) {
							//alert(icns[i].getAttribute("id") + "-" + icns[i].nextSibling.nextSibling.nextSibling.nodeName);
							tmp[0].src = plusimg.src;
						}
					}
				}
				el.style.display = "block";
				icn[0].src = minusimg.src;
			}else{
				el.style.display = "none";
				icn[0].src = plusimg.src;
			}
		}
	}
}

function get_cookie(Name) { 
	var search = Name + "="
	var returnvalue = "";
	if (document.cookie.length > 0) {
	offset = document.cookie.indexOf(search)
	if (offset != -1) { 
	offset += search.length
	end = document.cookie.indexOf(";", offset);
	if (end == -1) end = document.cookie.length;
	returnvalue=unescape(document.cookie.substring(offset, end))
	}
	}
	return returnvalue;
}

function onloadfunction(){
	if (persistmenu=="yes"){
		var cookiename=(persisttype=="sitewide")? "switchmenu" : window.location.pathname;
		var cookievalue=get_cookie(cookiename)
		if (cookievalue!="") {
			document.getElementById(cookievalue).style.display="block";
			tmp1 = document.getElementById(cookievalue).previousSibling.previousSibling.previousSibling.getElementsByTagName("img");
			tmp1[0].src = minusimg.src;
		}
	}
}

function savemenustate(){
	var inc=1, blockid="";
	while (document.getElementById("icon"+inc)){
		if (document.getElementById("sub"+inc) && document.getElementById("sub"+inc).style.display=="block"){
			blockid="sub"+inc;
			break;
		}
		inc++;
	}
	var cookiename=(persisttype=="sitewide")? "switchmenu" : window.location.pathname;
	var cookievalue=(persisttype=="sitewide")? blockid+";path=/" : blockid;
	document.cookie=cookiename+"="+cookievalue;
}

if (window.addEventListener)
	window.addEventListener("load", onloadfunction, false);
else if (window.attachEvent)
	window.attachEvent("onload", onloadfunction);
else if (document.getElementById)
	window.onload=onloadfunction;


if (persistmenu=="yes" && document.getElementById)
	window.onunload=savemenustate;