<title></title>
<style type="text/css">
* {
padding: 0;
margin: 0;
}
body { text-align: center; background:#ddd; }
div {
width: 170px;
margin: 100px auto;
}
a {
float: left;
width: 50px;
height: 50px;
border: solid 1px #000;
display: block;
line-height: 50px;
_line-height: 40px;
text-align: center;
margin: 0 -1px -1px 0;
z-index: 1;
position: relative;
}
a:hover {
border-color: red;
z-index: 2;
}
img{ width:50px; height:50px;}</style>
<div>
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原文：http://www.zaole.net/demo/20150302331.html
本文转自 小旭依然 51CTO博客，原文链接:http://blog.51cto.com/xuyran/1785148
