<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
*{
margin: 0px;
padding: 0px;
}
body{
background: black;
}
.main{
width: 1000px;
height: 500px;
position: absolute;
background: #ccc;
left: 50%;
top:50%;
margin-left: -500px;
margin-top: -250px;
}
</style>
</head>
<body>
<div class="main">
</div>
</body>
</html>
实现让一个DIV在电脑屏幕的正中间显示！
原文：http://blog.51cto.com/11871779/2066283
