function get_diffY(){
	var diffY
	if (document.documentElement && document.documentElement.scrollTop)
		diffY = document.documentElement.scrollTop;
	else if (document.body)
		diffY = document.body.scrollTop
	else
	    diffY=0
	return diffY
}


var lastScrollY=0;
function get_percent(){
	var percent=.1*(get_diffY()-lastScrollY); 
	if(percent>0)percent=Math.ceil(percent); 
	else percent=Math.floor(percent); 
	return percent
}

function ScrollY(){
	var percent=get_percent()
	document.getElementById("secondleft").style.top=parseInt(document.getElementById("secondleft").style.top)+percent+"px";

//	document.getElementById("secondleft").style.left=document.getElementById("contain").offsetLeft;///
	lastScrollY=lastScrollY+percent; 
}
function heartBeat(){
	if(get_diffY()>10)document.getElementById("secondleft").style.top=get_diffY(); 
	else document.getElementById("secondleft").style.top=10;
	ScrollY()
}
window.onload = function() {
            
    setInterval(heartBeat,10);
}