function random_imglink(){
var myimages=new Array()
//specify random images below. You can have as many as you wish
myimages[1]="/images/rect_rational.gif"
myimages[2]="/images/rect_amd.gif"
myimages[3]="/images/rect_oxford.gif"

//specify corresponding links below
var imagelinks=new Array()
imagelinks[1]="/sponsors"
imagelinks[2]="/sponsors"
imagelinks[3]="/sponsors"


var ry=Math.floor(Math.random()*myimages.length)
if (ry==0)
ry=1
document.write('<a href='+'"'+imagelinks[ry]+'"'+'><img src="'+myimages[ry]+'" width=186 height=115 border=0 class=padreg></a>')
//document.write('<img src="'+myimages[ry]+'" width=150 height=75>')
}
random_imglink()