var randomImages = new Array()

randomImages[0] = 'images/banner_01.jpg'
randomImages[1] = 'images/banner_02.jpg'
randomImages[2] = 'images/banner_03.jpg'
randomImages[3] = 'images/banner_04.jpg'
randomImages[4] = 'images/banner_05.jpg'
randomImages[5] = 'images/banner_06.jpg'
randomImages[6] = 'images/banner_07.jpg'
randomImages[7] = 'images/banner_08.jpg'
randomImages[8] = 'images/banner_09.jpg'
randomImages[9] = 'images/banner_10.jpg'
randomImages[10] = 'images/banner_11.jpg'
randomImages[11] = 'images/banner_12.jpg'
randomImages[12] = 'images/banner_13.jpg'
randomImages[13] = 'images/banner_14.jpg'
randomImages[14] = 'images/banner_15.jpg'

var j = 0
var p = randomImages.length;
var preBuffer = new Array()

for (i = 0; i < p; i++){
   preBuffer[i] = new Image()
   preBuffer[i].src = randomImages[i]
}

var whichImage = Math.round(Math.random()*(p-1));
function showImage(){
document.write('<img src="'+randomImages[whichImage]+'" alt="Bobby White GB Handball player" width="800" height="240" />');
}