<!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>无标题文档</title>
<link href="css/css.css" rel="stylesheet"/>
<style type="text/css">
.div1{800px; height:500px; background:#9C9}
.div2{800px; height:900px; background:#ff0; margin:20px 0}
.div3{800px; height:550px; background:#ccc}
</style>
</head>
<!--点击按钮跳转到那个div，就给那个div添加id，id的名字和按钮的href里的名字一样-->
<body>
<div class="div1" id="dingdan">
</div>
<div class="div2" >
</div>
<div class="div3" >
Copyright
</div>
<a href="#dingdan">
<img src="images/but21_8.jpg" width="111" height="33" border="0" usemap=""/>
</a>
</body>
</html>