<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style>
.content { width:960px;
height:2024px;
border:1px solid #000;
margin:0 auto;
}.nav { width:100%;
height:30px;
margin:0 auto;
background:#f00;
position:fixed;
bottom:0;
text-align:center;
}</style>
</head>
<body>
<div class="content"></div>
<div class="nav">导航</div>
</body>
</html>