var lastScrollY=0;
function heartBeat(){ 
   diffY=document.documentElement.scrollTop||document.documentElement.scrollTop||document.body.scrollTop; 
   percent=0.1*(diffY-lastScrollY); 
   if(percent>0)percent=Math.ceil(percent); 
   else percent=Math.floor(percent); 
   document.getElementById("sorollDiv1").style.top=parseInt(document.getElementById("sorollDiv1").style.top)+percent+"px";
   var t=parseInt(document.getElementById("sorollDiv1").style.top);
  
   
   lastScrollY=lastScrollY+percent; 
}
window.setInterval("heartBeat()",1);