document.write('

解析：

<!DOCTYPE html PUBLIC "-//W3C//DTD Xhtml 1.0 Transitional

//EN" "">

<html xmlns="">

<head>

<meta name="author" type="Nancle from CAU CS101" />

<meta http-equiv="Content-Type" content="text/html;

charset=utf-8"/>

<title> 如何让 img 标签在 DIV 里左右、上下居中 </title>

<script type="text/JavaScript"> </script>

<style type="text/css">

#container{width:400px;height:400px;background:#ccc;

text-align:center;}

img{margin:100px auto 0 auto;}

</style>

</head>

<body>

<div id="container">

<img src="" width="200" height="200" />

</div>

<p>

</p>

</body>

</html>

');