var theImages = new Array()
theImages[0] = '/main/jackPortrait.jpg'
theImages[1] = '/main/jackPortrait2.jpg'
theImages[2] = '/main/jackPortrait3.jpg'
theImages[3] = '/main/jackPortrait4.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]
}
function showImage(){
	var whichImage = Math.round(Math.random()*(p-1));
	document.write('<img src="'+theImages[whichImage]+'" width="170" height="212" />');
}