<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>addevent</title>
</head>
<body style="height:9000px;">
<div style="position:fixed; top:0px; left:0px;">
<div id="test"></div>
<div id="test2"></div>
</div>
<script>
var $ = function(id){
return document.getElementById(id);
}
var addEvent = function(obj,event,fn){
if(obj.addEventListener){
obj.addEventListener(event,fn,false);
}else if(obj.attachEvent){
obj.attachEvent("on"+event,fn);
}
}
var scrollEvent = function(){
var screenHeight =document.documentElement.clientHeight||document.body.clientHeight;
var scrollHeight = document.documentElement.scrollTop||document.body.scrollTop;
$('test').innerHTML= "可视高度：" + screenHeight;
$("test2").innerHTML= "滚动高度：" + scrollHeight;
}
addEvent(window,'load',function(){
scrollEvent();
});
addEvent(window,'scroll',function(){
scrollEvent();
});
addEvent(window,'resize',function(){
scrollEvent();
});
</script>
</body>
</html>
