<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
html, body, #wrap {height: 100%;}
body > #wrap {height: auto; min-height: 100%;}
#main {padding-bottom: 150px;} /* 必须使用和footer相同的高度 */
#footer {position: relative;
margin-top: -150px; /* footer高度的负值 */
height: 150px;
clear:both;
background-color:#EAEAEA;}

</style>
</head>
<body>
<div id="wrap">
<div id="main" class="clearfix">
<div id="content">
</div>
<div id="side">
</div>
</div>
</div>
<div id="footer">
</div>
</body>
</html>