// JavaScript Document
var theImages = new Array()

theImages[0] = '/media/img_banner.jpg'
theImages[1] = '/media/img_banner_f2.jpg'
theImages[2] = '/media/img_banner_f3.jpg'
theImages[3] = '/media/img_banner_f4.jpg'
theImages[4] = '/media/img_banner_f5.jpg'

var j = 0
var p = theImages.length;
var preBuffer = new Array()
for (var i = 0; i < p; i++){
   preBuffer[i] = new Image()
   preBuffer[i].src = theImages[i]
}
var whichImage = Math.round(Math.random()*(p-1));
function showImage(){
document.write('<img src="'+theImages[whichImage]+'">');
}