What page?

The first page.. home page.. On IE and Chrome there's the effect of stars moving in the background.. on Mozilla Foxfire there's just black background.. Thanks!!

www.4evererin.com

That script isn't working in Firefox.
You can't have multiple IDs si and address them via si[i]
You need to use a similar construction as for Netscape and add the index to the ID (si0-siXX)and use document.getElementById('si'+i)

I don't think that there are much users with a Netscape browser, so you can leave out all that ns code and use code that modern browsers understand.

for (i = 0; i < SmallStars; i++) {
document.write('<div id="si'+i+'" style="position:absolute;top:0;left:0;width:1px;height:1px;background:#fffff0;font-size:1px"></div>');
}

function fly() {
.....
document.getElementById('li'+i).style.left = LargeXpos[i];
document.getElementById('li'+i).style.top = LargeYpos[i] + hscrll;
.....
document.getElementById('si'+i).style.left = SmallXpos[i];
document.getElementById('si'+i).style.top = SmallYpos[i]+hscrll;
.....
setTimeout('fly()', 10);
}