<!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=gb2312" />
<title>test.html</title>
</head>
<style>
.div_01{
margin:0 auto;
text-align:center;
}
.div_01 img{
margin:0 auto;
vertical-align:middle;
}
</style>
<body>
<div class="div_01">
<img src="http://www.baidu.com/img/baidu_logo.gif"/>
</div>
</body>
</html>
<!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=gb2312" />
<title>test.html</title>
</head>
<style>
.div_01{
width:500px;
height:500px;
border:1px solid green;
margin:0 auto;
text-align:center;
}
.div_01 img{
width:400px;
height:400px;
border:1px solid blue;
margin:0 auto;
vertical-align:middle;
margin-top:48px;
}
</style>
<body>
<div class="div_01">
<img src="http://www.baidu.com/img/baidu_logo.gif"/>
</div>
</body>
</html>
