old Netscape layer animation

I don’t have much Javascript experience but I’ve had this old Netscape layer animation that stopped working years ago and I’d like to get it working again under Firefox and IE6+. As you can see, I tried the obvious replacement of “document.layers” with “document.getElementById” but that didn’t help. Any ideas? Thanks.

[CODE]<script language=javascript>
<!–var ns=document.layers ? 1 : 0;–>
var ns=document.getElementById ? 1 : 0;
if (ns) {
window.PrxOff_captureEvents(Event.MOUSEMOVE);
var yBase = .5;
var xBase = .1;
var delay = 10;
var yAmpl = 0;
var yMax = 0;
var step = .1;
var ystep = 0;
var currStep = 0;
var tAmpl=.1;
var Xpos = 100;
var Ypos = 325;
var j = 0;
function MoveHandler(evnt) {
Xpos = evnt.pageX;
Ypos = evnt.pageY;
}
window.onMouseMove = MoveHandler;
function animateLogo() {
yBase = window.innerHeight/2;
xBase = window.innerWidth/2;
for (j=0; j<7 ;j++) {
document.layers[j].top = Ypos + Math.cos((Math.sin(currStep/10)))*yBase*(Math.cos(currStep/10))*Math.sin((currStep/1 + j*50));
<!– document.layers[j].left =Xpos + Math.sin((20*Math.sin(currStep/20)))*xBase*(Math.cos(currStep/10))*Math.sin((currStep)/10);–>
}
currStep += step;
setTimeout(“animateLogo()”, delay);
}
animateLogo();
}
</script>[/CODE]

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