function MM_showHideLayers() { //v3.0
var i,p,v,obj,args=MM_showHideLayers.arguments;
for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v; }
    obj.visibility=v; }
}

self.onError=null;
currentX = currentY = 0; 
whichIt = null;           
lastScrollX = 0; lastScrollY = -50;
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 = .1 * (diffY - lastScrollY);
                 if(percent > 0) percent = Math.ceil(percent);
                 else percent = Math.floor(percent);
    if(IE) document.all.floater.style.pixelTop += percent;
    if(NS) document.floater.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.floater.style.pixelLeft += percent;
    if(NS) document.floater.top += percent;
    lastScrollY = lastScrollY + percent;
   } 
} 
if(NS || IE) action = window.setInterval("heartBeat()",1);