这是我的代码~~~请大神们指导，，哪里出问题了，运行后没反应
-----------------------html文件--------------------
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>仿163世界杯信息条</title>
<script type="text/javascript" src="script3.js"></script>
<style type="text/css">
#info{
position: absolute;
bottom: 0px;
margin-left: 190px;
z-index: 1;
}
#clo{
position: absolute;
right: 5px;
top: 2px;
font-size: 12px;
cursor: pointer;
z-index: 2;
}
</style>
</head>
<body>
<div id="main" align="center">
<div id="info" align="center">
<span id="clo" onclick="cloinfo()">关闭</span>
<img src="foot.jpg">
</div>
<img src="content.jpg">
</div>
</body>
</html>
---------------------------------script文件-------------------------------------------
var ih;
var ch;
function move(){
ch = document.documentElement.clientHeight;
//
ih = document.getElementById("info").offsetHeight;
document.getElementById("info").style.top = (ch - ih
+document.documentElement.scrollTop) +'px';
// alert(document.getElementById("info").style.top);
}
window.onscroll = move;
function cloinfo(){
document.getElementById("info").style.display="none";
}
