var theImages = new Array()

theImages[0] = '1.jpg'
theImages[1] = '2.jpg'
theImages[2] = '3.jpg'
theImages[3] = '4.jpg'
theImages[4] = '5.jpg'

var j = 0
var p = theImages.length;

var preBuffer = new Array()
for (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="/cms_banner2004/'+theImages[whichImage]+'" width="187" height="163" border="0">');
}