//lastScrollY=0; 
//function heartBeat(){ 
//var scrollPos; 
//if (typeof window.pageYOffset != 'undefined') { 
//   scrollPos = window.pageYOffset; 
//} 
//else if (typeof document.compatMode != 'undefined' && 
//     document.compatMode != 'BackCompat') { 
//   scrollPos = document.documentElement.scrollTop; 
//} 
//else if (typeof document.body != 'undefined') { 
//   scrollPos = document.body.scrollTop; 
//} 

//diffY=scrollPos;
//percent=.1*(diffY-lastScrollY); 
//if(percent>0)percent=Math.ceil(percent); 
//else percent=Math.floor(percent); 
//document.all.backi.style.pixelTop+=percent; 
//document.all.backi2.style.pixelTop+=percent; 
//lastScrollY=lastScrollY+percent; 
//} 
//window.setInterval("heartBeat()",1);