var theImages = new Array() // do not change this

theImages[0] = '/assets/icon.jpg'
theImages[1] = '/assets/memorial.jpg'
theImages[2] = '/assets/students_homepage.jpg'
theImages[3] = '/assets/sunrise.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="'+theImages[whichImage]+'" alt="Random image" width="200" height="133" class="white_border" />');
}