Total newbe question. How do you add a background image? I've got HTML like so:

<BODY BACKGROUND="tealtile.jpg" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000ff" LINK="#800080" ALINK="#ff0000">

I've uploaded the image(and named it tealtile) to the site. I've tried inserting a <!--#var tealtile--> tag in the background property but that caused lots of havoc. I've looked through the docs but nothing helpful there. I'm pretty sure that this question has been asked before but the list archives don't have a search feature.