// JavaScript Document
$(document).ready(init);
function init(){
	$('#iframe').load('bar.html');
}

//浮動top
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 heartBeat(){
	var percent=get_percent();
	var obj=document.getElementById("top_floater");
    if(obj) {
	    obj.style.top=parseInt(obj.style.top)+percent+"px";
    	lastScrollY=lastScrollY+percent; 
    }
}
window.onload = function() {
setInterval(heartBeat,1);
}