-pie-background:url(image/shujian/bg2.png) repeat,url(image/shujian/bg1.png) 0px 150px repeat-x;
behavior: url(PIE.htc);

It work well for any div element by id selector.
But,use this code for "body",it does not work.

Is there some way to make body accept multiple background images ?

Unfortunately body is not supported, so you have to use a container element instead.

Thanks.
Container works well.