JAVASCRIPT MASTER NEEDED, help w/ the collapsible menu reili gave me Options

[add1cted2f1re]

look at this:
http://phoenixf1re.melilyn.com/avatars.php


see the submenu things "fall out boy" and "panic! at the disco" (well, panic! at the disco doesnt show up at all)?

well i want those to appear when i click "music"... so that i have a sublink type thing

so you would click "Music" and then the subcategories would appear

i KNOW its gotta do with this part of the code

CODE

<script type="text/javascript">



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>

and just in case... my page's code for the menu:

CODE

<div class="menutitle" onclick="SwitchMenu('sub1')"><font size=2>MUSIC</font></div>
<span class="submenu" id="sub1">

<div class="subtitle" onclick="SwitchMenu('sub2')"><font size=2>Fall Out Boy</font></div>
<span class="submenu" id="sub2">
<img src="images/avatars/fob/1.jpg" hspace=1>
<img src="images/avatars/fob/2.jpg" hspace=1>
<img src="images/avatars/fob/3.jpg" hspace=1>
<img src="images/avatars/fob/4.jpg" hspace=1>
<img src="images/avatars/fob/5.jpg" hspace=1>
<img src="images/avatars/fob/6.jpg" hspace=1>
<img src="images/avatars/fob/7.jpg" hspace=1>
<img src="images/avatars/fob/8.jpg" hspace=1>
<img src="images/avatars/fob/9.jpg" hspace=1>
<img src="images/avatars/fob/10.jpg" hspace=1>
<img src="images/avatars/fob/11.jpg" hspace=1>
<img src="images/avatars/fob/12.jpg" hspace=1>
<img src="images/avatars/fob/13.jpg" hspace=1>
<img src="images/avatars/fob/14.jpg" hspace=1>
</span>

<div class="subtitle" onclick="SwitchMenu('sub3')"><font size=2>Panic! At the Disco</font></div>
<span class="submenu" id="sub3">
<img src="images/avatars/patd/1.jpg" hspace=1>
<img src="images/avatars/patd/2.jpg" hspace=1>
<img src="images/avatars/patd/3.jpg" hspace=1>
<img src="images/avatars/patd/4.jpg" hspace=1>
<img src="images/avatars/patd/5.jpg" hspace=1>
<img src="images/avatars/patd/6.gif" hspace=1>
<img src="images/avatars/patd/7.jpg" hspace=1>
<img src="images/avatars/patd/8.jpg" hspace=1>
<img src="images/avatars/patd/9.jpg" hspace=1>
<img src="images/avatars/patd/10.jpg" hspace=1>
<img src="images/avatars/patd/11.jpg" hspace=1>
<img src="images/avatars/patd/12.jpg" hspace=1>
<img src="images/avatars/patd/13.jpg" hspace=1>
<img src="images/avatars/patd/14.jpg" hspace=1>
<img src="images/avatars/patd/15.jpg" hspace=1>
<img src="images/avatars/patd/16.jpg" hspace=1>
<img src="images/avatars/patd/17.jpg" hspace=1>
<img src="images/avatars/patd/18.jpg" hspace=1>
<img src="images/avatars/patd/19.gif" hspace=1>
</span>