function random_imglink(){
var myimages=new Array()

myimages[1]="images/eyecare.gif"
myimages[2]="images/youllsee.gif"
myimages[3]="images/measureup.gif"
myimages[4]="images/stylecomfortvision.gif"

var ry=Math.floor(Math.random()*myimages.length)
if (ry==0)
ry=1
document.write('<img src="'+myimages[ry]+'" border=0>')
}
random_imglink()