// ¿òÁ÷ÀÌ´Â ¸Þ´º
 /*self.onError=null;
 var currentX = 0;
 var currentY = 0;
 var whichIt = null;
 var lastScrollX = 0;
 var lastScrollY = 0;
 var action = window.setInterval('heartBeat()',1);
 
 function heartBeat() {
 var diffY = document.body.scrollTop;
 var diffX = 0;
  if (diffY != lastScrollY) {
  var percent = .2 * (diffY - lastScrollY);
   if (percent > 0) {
	percent = Math.ceil(percent);
   } else {
	percent = Math.floor(percent);
   }
   document.getElementById.item.style.pixelTop += percent;
   lastScrollY = lastScrollY + percent;
   document.getElementById.item2.style.pixelTop += percent;
   lastScrollY = lastScrollY + percent;
  }
  if (diffX != lastScrollX) {
   percent = .2 * (diffX - lastScrollX);
   if (percent > 0) {
	percent = Math.ceil(percent);
   } else {
	percent = Math.floor(percent);
   }
   document.getElementById.item.style.pixelLeft += percent;
   lastScrollY = lastScrollY + percent;
   document.getElementById.item2.style.pixelLeft += percent;
   lastScrollY = lastScrollY + percent;
  }
 }
 */