var currentImage = 0;
var rotateInterval = 3000; // msec
var images = new Array();

images = ["4.jpg","11.jpg","3.jpg","13.jpg","2.jpg","15.jpg","10.jpg","5.jpg","1.jpg","14.jpg","9.jpg","12.jpg","6.jpg","7.jpg","8.jpg"];

for (i = 0; i < images.length; i++)
{
	var cache = new Image();
	cache.src = 'images/slideshow/'+images[i];
}

window.setTimeout('rotate();', rotateInterval);

function rotate()
{
	currentImage = (currentImage + 1) % images.length;

	document.getElementById("slideshow").style.backgroundImage = "url(images/slideshow/" + images[currentImage] + ")";

	window.setTimeout('rotate();', rotateInterval);
}