function fudong(idName)
{if ((idName).style.display=='block')
{(idName).style.display='none'}
else {(idName).style.display='block'}};
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.getElementById("fudong01").style.top=parseInt(document.getElementById("fudong01").style.top)+percent+"px";
lastScrollY=lastScrollY+percent; 
} 
window.setInterval("heartBeat()",1);