/***********************************************
* Switch Menu script- by Martial B of http://getElementById.com/
* Modified by Dynamic Drive for format & NS4/IE4 compatibility
* Visit http://www.dynamicdrive.com/ for full source code
* Code tidied up by BMZF
***********************************************/

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');
}

function switchMenu(obj){
	if(document.getElementById){
		var el = document.getElementById(obj);
		var ar = document.getElementById("masterdiv").getElementsByTagName("span");
		if(el.style.display != "block"){
			for (var i=0; i<ar.length; i++){
				if (ar[i].className=="submenu")
					ar[i].style.display = "none";
			}
			el.style.display = "block";
		}else{
			el.style.display = "none";
		}
	}
}

function getCookie(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 = getCookie(cookiename);
		if(cookievalue != "")
			document.getElementById(cookievalue).style.display = "block";
	}
}

function saveMenuState(){
	var inc = 1, blockid = "";
	while(document.getElementById("sub"+inc)){
		if (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;