var theImages = new Array()

theImages[0] = '/static/media/images/bg_home5.gif'
theImages[1] = '/static/media/images/bg_home7.gif'

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('<table width="768" height="625"  border="0" align="center" cellpadding="0" cellspacing="0" background="'+theImages[whichImage]+'">');
}