[Jon]

Try

{literal}
<script language="JavaScript">
<!--
/*
Random Image Script- By JavaScript Kit (http://www.javascriptkit.com) 
Over 400+ free JavaScripts here!
Keep this notice intact please
*/
function random_imglink(){
var myimages=new Array()
//specify random images below. You can have as many as you wish
myimages[1]="{/literal}{$ImagesDir}{literal}/ezbail.jpg"
myimages[2]="{/literal}{$ImagesDir}{literal}/swivelclamp.jpg"
myimages[3]="{/literal}{$ImagesDir}{literal}/speaker.jpg"
var ry=Math.floor(Math.random()*myimages.length)
if (ry==0)
ry=1
document.write('<img src="'+myimages[ry]+'">')
}
random_imglink()
//-->
</script> 
{/literal}