// JavaScript Document

var imagenumber = 3 ; 
var randomnumber = Math.random() ; 
var rand1 = Math.round( (imagenumber-1) * randomnumber) + 1 ; 
images = new Array 
images[1] = "../stylesheet/banner1.jpg" 
images[2] = "../stylesheet/banner2.jpg" 
images[3] = "../stylesheet/banner3.jpg" 
var image = images[rand1] 

document.write('<IMG SRC="' + image + '">')