<!DOCTYPE html>
<html>
<head>
<style>
body{
width: 100%;
height: 100%;
background-image :url('bg0.jpg');
background-position:center center;
background-size:cover;
background-repeat:no-repeat;
background-attachment:fixed;
}
</style>
</head>
<body >
</body>
</html>
效果图
