<html>
<head>
<style type="text/css">
body
{
background-image:url('/img/eg_bg_03.gif');
background-repeat:no-repeat;
background-attachment:fixed;
background-position:center;
}
</style>
</head>
<body>
<p><b>提示：</b>您需要把 background-attachment 属性设置为 "fixed"，才能保证该属性在 Firefox 和 Opera 中正常工作。</p>
</body>
</html>