Switch Menu Problem

[Liburd]

Hey, Im having trouble with my switch menu. The Javascript is in the page but its still not opening +rep for help

http://habbonetwork.co.uk/site.php

[Jahova]

Line 121, Char 2 is undefined.
You must be doing somthing wrong. As that part of the code is the javascript of the switch menu.

Make sure you are following the tut 100%, otherwise you could've slipped up somewhere.

- Tom

*** EDIT ***
Try putting the below in between the body tags rather than the head.
Once done that, remove the part where you've shoved it in the head tags and test.

<script type="text/javascript">
/***********************************************
* 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
***********************************************/
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){ //DynamicDrive.com change
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"); //DynamicDrive.com change
  if(el.style.display != "block"){ //DynamicDrive.com change
   for (var i=0; i<ar.length; i++){
    if (ar[i].className=="submenu") //DynamicDrive.com change
    ar[i].style.display = "none";
   }
   el.style.display = "block";
  }else{
   el.style.display = "none";
  }
 }
}
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"
}
}
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
</script>

[Liburd]

Its still not working :S