var theImages = new Array()

theImages[0] = '_imgs/home/index01.jpg'
theImages[1] = '_imgs/home/index02.jpg'
theImages[2] = '_imgs/home/index03.jpg'
theImages[3] = '_imgs/home/index04.jpg'
theImages[3] = '_imgs/home/index05.jpg'
theImages[3] = '_imgs/home/index06.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]+'">');
}