+ it will have an effect like this, click on the image to change this page background:

no background?


Paste this on the begining of the page:
<script language="JavaScript"> function chaImHa51(img) { if (document.all || document.getElementById) { document.body.background=img; if (navigator.userAgent.indexOf("Mac")!=-1 && navigator.appVersion.indexOf("MSIE 5")!=-1) { window.resizeBy(0,-1); window.resizeBy(0,1); } } } </script>

Paste this for no background to where you want it to appear:
<a href="#" onclick="chaImHa51("none");return false">no background?</a>

The main code, replace the two BG_LINK_HERE:
<a href="#" onclick="chaImHa51(" BG_LINK_HERE ");return false"><img src="BG_LINK_HERE"border="0"></a>