[jQuery] body background-image

Hi--
Pretty new to using Jquery. How do I dynamically change the body
background image? I have:
$("img").click(function() {
$("document.body").css("background-image", "url(img/
body.jpg)");
});
I've tried lots of variations but none seem to work.
Thanks,
T.
_______________________________________________
jQuery mailing list
discuss@jquery.com
http://jquery.com/discuss/