<!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>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<style type="text/css">
p#outer {
position:relative;
float:left;
margin-top:20px;
margin-left:20px;
background: blue;
}
#outer a {
margin:0;
background-color:blue;
display:block;
position: relative;
border:2px dashed red;
}
#outer a:hover {border:2px dashed #CCFFCC;}
#outer img {display:block;border:none;background:#ffffcc;padding:4px;}
</style>
</head>
<body>
<h1>Hover over the image to see the double border effect</h1>
<p id="outer"><a href="#"><img src="http://www.webjx.com/images/logo.gif" alt="example image border" width="150" height="86" /></a>
</p>
</body>
</html>
[Ctrl+A 全部选择 提示：你可先修改部分代码，再按运行]
