Need help with a small javascript...

[Tino]

Another question.

I would like to make the page/script availabe for Netscape and other browsers. I really dont know enough about javascript to change the code myself. I asked some wiseguy how to do it he said this:
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What you can do is make use of, for instance classes...

<div class="dropmsg1">

and then do something along the lines of:

function expandone(){
if (document.getElementsByTagName) {
var an = document.getElementsByTagName('div');
for (i=0; i<an.length; i++) {
if (an.item(i).getAttribute('class') == "dropmsg"+selectedItem ) {
var selectedItem=document.dropmsgform.dropmsgoption.selectedIndex
contractall()
an.item(i).style.display='block'
}
}
}
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I tried to install this by replacing some of the lines in the current script with this, but since I dont have a clue what im doing- I cant get it working:-(