网页内容居中显示
HTML
<body>
<form>
<divid="container">
<divid="header">Header</div>
<divid="content">Content</div>
<divid="footer">Footer</div>
</div>
</form>
</body>
CSS
<styletype="text/css">
#container{margin:0auto;width:600px;border:1pxsolidred;}
#header{border:1pxsolidblue;}
#content{height:360px;}
#footer{border:1pxsolidgreen}
</style>