<!DOCTYPE html>
<html>
<head>
<title> 固定宽高的元素居中示例 </title>
<style>
.content{
width: 400px;
height: 300px;
position: absolute;
left: 50%;
top: 50%;
margin-left: -200px;
margin-top: -150px;
background-color: #8888CC;
}
</style>
</head>
<body>
<div class="content">
<p>指定页面居中的元素</p>
</div>
</body>
</html>
