右上固定专用：

<style type="text/css">
body{
background-image:url("背景URL");
background-position:100% 0%;
background-repeat:no-repeat;
background-attachment:fixed;}
</style>

        右下固定专用：

<style type="text/css">
body{
background-image: url("背景URL");
background-repeat: no-repeat;
background-attachment: right bottom;
}
</style>

        左上固定专用：

<style type="text/css">
body{
background-image:url("背景URL");
background-repeat:no-repeat;
background-attachment:fixed;} 
</style>

        左下固定专用：

<style type="text/css">
body{
background-image:url("背景URL");
background-position:0% 100%;
background-repeat:no-repeat;
background-attachment:fixed;}
</style>

        正中固定专用：

<style type="text/css">
body{
background-image:url("背景URL");
background-repeat:no-repeat;
background-attachment:fixed;
background-position:center ;} 
</style>

        右边固定专用：

<style type="text/css">
body{
background-image:url("背景URL");
background-position:100% 0%;
background-repeat:repeat-y;
background-attachment:fixed;}
</style>

        左边固定专用：

<style type="text/css">
body{
background-image:url("背景URL");
background-repeat:repeat-y;
background-attachment:fixed;}
</style>

        上边固定专用：

<style type="text/css">
body{
background-image:url("背景URL");
background-repeat:repeat-x;
background-attachment:fixed;}
</style>

        下边固定专用：

<style type="text/css">
body{
background-image:URL("背景URL");
background-position:bottom;
background-repeat:repeat-x;
background-attachment:fixed;}
</style>