<!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>
<style>
<!--
* {margin:10;padding:10}
div {
width:180px;
height:180px;
border:1px solid #000;
position:relative;
display:table-cell;
text-align:center;
vertical-align:middle
}
div p {
position:static;
+position:absolute;
top:50%
}
div img {
position:static;
+position:relative;
top:-50%;left:-50%;
}
-->
</style></style>
</head>
<body>
<div>
<p><img src="http://www.domix.cn/static/team/2011/0225/12986229678396.jpg" width="120" height="120" /></p>
</div>
<div>
<p><img src="http://www.domix.cn/static/team/2011/0225/12986229678396.jpg" width="160" height="160" /></p>
</div>
<div>
<p><img src="http://www.domix.cn/static/team/2011/0225/12986229678396.jpg" width="130" height="160" /></p>
</div>
<div>
<p><img src="http://www.domix.cn/static/team/2011/0225/12986229678396.jpg" width="170" height="110" /></p>
</div>
</body>
</html>
一个div在页面中上下左右居中的样式如下：
.Div {
width:500px;
height:300px;
margin:-150px 0px 0px -250px;
position:absolute;
top:50%;
left:50%;
background:red;
}