<!-- // 공통top버튼

 self.onError=null;
 currentX = currentY = 0;  
 whichIt = null;           
 lastScrollX = 0; lastScrollY = 0;
 NS = (document.layers) ? 1 : 0;
 IE = (document.all) ? 1: 0;

 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.getElementById("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.getElementById("floater").style.pixelLeft += percent;
   if(NS) document.floater.top += percent;
   lastScrollY = lastScrollY + percent;
  } 
}
//-->