<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>demo</title>
<style type="text/css">
* {margin:0px;padding:0px;}
html, body {height:100%;overflow:Hidden}
html > body {position:absolute;top:0;left:0;bottom:0;right:0;height:auto;width:auto;}
#main {_padding:60px 0px;width:100%;height:100%; background:#000000}/*important*/
#top {position:absolute;top:0px;left:0px;height:60px;width:100%;background:red}
#middle {width:100%;height:100%;background:blue;} /*important*/
#main>#middle {position:absolute;left:0px;top:60px;bottom:60px;height:auto;} /*important*/
#bottom {position:absolute;left:0px;bottom:0px;width:100%;height:60px;background:yellow;}
</style>
</head>
<body >
<div id="main">
<div id="top">top</div>
<div id="middle">middle</div>
<div id="bottom">bottom</div>
</div>
</body>
</html>
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