var randImages = new Array()

randImages[0] = 'images/rand01.jpg'
randImages[1] = 'images/rand02.jpg'
randImages[2] = 'images/rand03.jpg'
randImages[3] = 'images/rand04.jpg'
randImages[4] = 'images/rand05.jpg'
randImages[5] = 'images/rand06.jpg'
randImages[6] = 'images/rand07.jpg'
randImages[7] = 'images/rand08.jpg'

// do not edit anything below this line

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