var homepage_images = new Array();

homepage_images[0] = '1.jpg';
homepage_images[1] = '2.jpg';
homepage_images[2] = '3.jpg';
homepage_images[3] = '4.jpg';
homepage_images[4] = '5.jpg';
homepage_images[5] = '6.jpg';
homepage_images[6] = '7.jpg';
homepage_images[7] = '8.jpg';
homepage_images[8] = '9.jpg';

var i = 0;
var num_images = homepage_images.length;
var preBuffer = new Array();

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

var whichImage = Math.round(Math.random() * (num_images - 1));

function random_image(){
	image_holder = document.getElementById('home_intro');
	image_holder.style.backgroundImage = 'url(ui/random_images/' + homepage_images[whichImage] + ')';
}