var theImages = new Array()

theImages[0] = 'index_cover01.jpg';
theImages[1] = 'index_cover02.jpg';
theImages[2] = 'index_cover03.jpg';

// do not edit anything below this line

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 showCoverImage(){
	var imgEl = document.createElement("IMG");
	imgEl.setAttribute("src","images/index/"+theImages[whichImage]);
	$('coverImage').appendChild(imgEl);
}