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() { 
if(IE) { 
diffY = document.body.scrollTop; 
diffX = 0; 
} 
if(NS) { diffY = self.pageYOffset; diffX = self.pageXOffset; } 
if(diffY != lastScrollY) { 
percent = .06 * (diffY - lastScrollY); //move speed
if(percent > 0) percent = Math.ceil(percent); 
else percent = Math.floor(percent); 
if(IE) document.all.bar.style.pixelTop += percent; 
if(NS) document.bar.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) document.all.bar.style.pixelLeft += percent; 
if(NS) document.bar.top += percent; 
lastScrollY = lastScrollY + percent; 
} 
} 
if(NS || IE) action = window.setInterval("heartBeat()",1);