one function needed

[rkz]

I have a tree menu script:

var enablepersist="on" //Enable saving state of content structure using session cookies? (on/off)
var collapseprevious="no" //Collapse previously open content when opening present? (yes/no)

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

function getElementbyClass(classname){
ccollect=new Array()
var inc=0
var alltags=document.all? document.all : document.getElementsByTagName("*")
for (i=0; i<alltags.length; i++){
if (alltags[i].className==classname)
ccollect[inc++]=alltags[i]
}
}

function contractcontent(omit){
var inc=0
while (ccollect[inc]){
if (ccollect[inc].id!=omit)
ccollect[inc].style.display="none"
inc++
}
}

function expandcontent(cid){
if (typeof ccollect!="undefined"){
if (collapseprevious=="yes")
contractcontent(cid)
document.getElementById(cid).style.display=(document.getElementById(cid).style.display!="block")? "block" : "none"
}
}

function revivecontent(){
contractcontent("omitnothing")
selectedItem=getselectedItem()
selectedComponents=selectedItem.split("|")
for (i=0; i<selectedComponents.length-1; i++)
document.getElementById(selectedComponents[i]).style.display="block"
}

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 getselectedItem(){
if (get_cookie(window.location.pathname) != ""){
selectedItem=get_cookie(window.location.pathname)
return selectedItem
}
else
return ""
}

function saveswitchstate(){
var inc=0, selectedItem=""
while (ccollect[inc]){
if (ccollect[inc].style.display=="block")
selectedItem+=ccollect[inc].id+"|"
inc++
}

document.cookie=window.location.pathname+"="+selectedItem
}

function do_onload(){
getElementbyClass("expand")
if (enablepersist=="on" && typeof ccollect!="undefined")
revivecontent()
}


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

if (enablepersist=="on" && document.getElementById)
window.onunload=saveswitchstate

I need function that would collapse all my menu items.
using: <a href="#" onclick="expandall()">expand all</a>
<a href="#" onclick="closeall()">default tree</a> (sorry dont know how to say it).

I cand do it myself, please help me, it shouldnt be very difficult

[bluewalrus]

A toggle i think its called.
Html:

<a href="#" onclick="return toggleMe('nameofdiv')">Expand Window</a><br />
<div id="nameofdiv" style="display:none">
What evers hidden until click
<br /><a href="#" onclick="return toggleMe('nameofdiv')">Collapse Window</a>

Make a .js called what ever you want link it with
<script type="text/javascript" src="filename.js"></script>
Then put this inside that js file might work being put straight into the html page but i forget.

function toggleMe(a){
  var e=document.getElementById(a);
  if(!e)return true;
  if(e.style.display=="none"){
    e.style.display="block"
  } else {
    e.style.display="none"
  }
  return true;
}

[rkz]

maby your idea is good, but this time, I need something different.
In ohter words, I need to optimize
onclick="expandcontent('sub1');expandcontent('subn-1');expandcontent('subn');expandcontent('subn+1');"

Actually there are many such links from subxxx to subyyy and etc, So I need something wildcard like expandcontent('sub*'); or something that I dont know