var theImages = new Array();

theImages[0] = 'bg1.jpg';
theImages[1] = 'bg2.jpg';
theImages[2] = 'bg3.jpg';
theImages[3] = 'bg4.jpg';
theImages[3] = 'bg5.jpg';
theImages[3] = 'bg6.jpg';
theImages[3] = 'bg7.jpg';
theImages[3] = 'bg8.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('<a href="/index.html"><img border="0" height="129" width="900" alt="Top Banner" src="/images/layout/'+theImages[whichImage]+'"></a>');
}