var currentX = currentY = 0;  
var lastScrollX = 100; lastScrollY = 100;
var positioned = 0;
        
NS = (document.layers) ? 1 : 0;
IE = (document.all) ? 1: 0;
        
<!-- STALKER CODE -->
function heartBeat() {
        
	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) document.all.watermark.style.pixelBottom = percent+10;
        if(NS) document.watermark.top = window.innerHeight+window.pageYOffset-53-percent;
        lastScrollY = lastScrollY + percent;
 	}
    if(diffX != lastScrollX || !positioned) {
    	percent = .1 * (diffX - lastScrollX);
	    if(percent > 0) percent = Math.ceil(percent);
    	else percent = Math.floor(percent);
        if(IE) document.all.watermark.style.pixelRight = percent+10;
        if(NS) document.watermark.left = window.pageXOffset+window.innerWidth-84-percent;
	    lastScrollX = lastScrollX + percent;
    }       
	
}
<!-- /STALKER CODE -->
        
        
if(NS || IE) action = window.setInterval("heartBeat()",1);