Javascript Macintosh Compatibility - Emergency!

[Outshine]

Hello All,

A bit of an emergency here as I have to deploy this very soon and just ran across a macintosh compatibility issue. I use a standard drop-down menu that works beautifully in IE and Netscape on PC, but not at all on Mac. Here's what I'm doing.

I have this script in the head of the document:

_______________________________
var head="display:''"
img1=new Image()
img1.src="fold.gif"
img2=new Image()
img2.src="open.gif"

var ns6=document.getElementById&&!document.all
var ie4=document.all&&navigator.userAgent.indexOf("Opera")==-1

function checkcontained(e){
var iscontained=0
cur=ns6? e.target : event.srcElement
i=0
if (cur.id=="foldheader")
iscontained=1
else
while (ns6&&cur.parentNode||(ie4&&cur.parentElement)){
if (cur.id=="foldheader"||cur.id=="foldinglist"){
iscontained=(cur.id=="foldheader")? 1 : 0
break
}
cur=ns6? cur.parentNode : cur.parentElement
}

if (iscontained){
var foldercontent=ns6? cur.nextSibling.nextSibling : cur.all.tags("UL")[0]
if (foldercontent.style.display=="none"){
foldercontent.style.display=""
cur.style.listStyleImage="url(open.gif)"
}
else{
foldercontent.style.display="none"
cur.style.listStyleImage="url(fold.gif)"
}
}
}

if (ie4||ns6)
document.onclick=checkcontained
____________________________

Then, for the menu I have this inside of a table:
____________________________

<ul>
<li id="foldheader"><img src="images/getinvolved.gif"></li>
<ul id="foldinglist" style="display:none" style=&{head};>
<li><a class="link" href="getinvolved/contribute.html">Contribute</a></li>
<li><a class="link" href="getinvolved/volunteer.html">Volunteer</a></li>
<li><a class="link" href="getinvolved/registertovote.html">Register to Vote</a></li>
<li><a class="link" href="getinvolved/localpaper.html">Write to your Local Paper</a></li>
</ul>
___________________________
I have a graphic (images/getinvolved.gif) and when the user clicks on it, it drops down with the other options. Like I said, it works great on everything but Mac. On mac, the images appear to be clickable (The "click" icon appears) but when I click absolutely nothing happens. I know I'm asking for a lot, but I *really* appreciate any help. Thank you!

Luke

[Outshine]

I will paypal $50.00 to anyone who can help me fix this problem. Thanks