<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
*{margin:0;padding:0;}
html,body{height:100%;color:#fff;}
.main{background:#ccc;_height:100%;min-height:100%;}
.main_m{padding-bottom:60px;background:#333;height:10px;}
.footer{width:100px%;height:50px;background:black;margin-top:-50px;}
</style>
</head> <body>
<div class="main">
<div class="main_m">这里加内容，这里用了padding-bottom把footer的高度留出来</div>
</div>
<div class="footer">这是底部</div>
</body> </html>