self.onError = null;
currentX = currentY = 0; 
whichIt = null; 
lastScrollX = 0; lastScrollY = 0;
NS = (document.layers) ? 1 : 0;
IE = (document.all) ? 1: 0;
<!-- STALKER CODE -->
function heartBeat(objectid) {
if(IE) { diffY = document.body.scrollTop; diffX = document.body.scrollLeft; }
if(NS) { diffY = self.pageYOffset; diffX = self.pageXOffset; }
if(diffY != lastScrollY) {
percent = .1 * (diffY - lastScrollY);
if(percent > 0) percent = Math.ceil(percent);
else percent = Math.floor(percent);
if(IE) {
objectid = objectid.split(";"); 
for (i = 0; i < objectid.length; i++) eval("document.all."+objectid[i]).style.pixelTop += percent;
} 
if(NS) {
objectid = objectid.split(";"); 
for (i = 0; i < objectid.length; i++) eval("document."+objectid[i]).top += percent; 
} 
lastScrollY = lastScrollY + percent;
}
if(diffX != lastScrollX) {
percent = .1 * (diffX - lastScrollX);
if(percent > 0) percent = Math.ceil(percent);
else percent = Math.floor(percent);
if(IE) {
objectid = objectid.split(";"); 
for (i = 0; i < objectid.length; i++) eval("document.all."+objectid[i]).style.pixelLeft += percent;
} 
if(NS) {
objectid = objectid.split(";"); 
for (i = 0; i < objectid.length; i++) eval("document."+objectid[i]).left += percent; 
} 
lastScrollX = lastScrollX + percent;
} 
}
<!-- /STALKER CODE -->
if(NS || IE) action = window.setInterval("heartBeat('floater1')", 1);
if (IE){
//document.write("<DIV id='floater' style='LEFT: 12px; TOP: 25px; POSITION: absolute; WIDTH: 80; VISIBILITY: visible; Z-INDEX: 10;filter: Alpha(Opacity=88)'><a href='#' target='_blank'><IMG src='images/left_1.gif' height='200' width='90' border='0'></a></DIV>");
document.write("<DIV id='floater1' style='LEFT: 788px;; TOP: 345px; POSITION: absolute; WIDTH: 80; VISIBILITY: visible; Z-INDEX: 10; filter: Alpha(Opacity=88)'><a href='#' target='_blank'><IMG src='images/right_ads.gif' height='225' width='205' border='0'></a></DIV>");
} 
if (NS){
document.write("<layer id=myleft top=5 width=80 height=80></layer>");
}