function preloadImages() {
	if (document.images) {
		for (var i = 0; i < preloadImages.arguments.length; i++) {
		(new Images()).src = preloadImages.arguments[i];
		}
	}
}

image1 = new Image();
image1.src = "images/restore_blur.jpg";

roll1 = new Image();
roll1.src = "images/restore.jpg";

image2 = new Image();
image2.src = "images/manage_blur.jpg";

roll2 = new Image();
roll2.src = "images/manage.jpg";

image3 = new Image();
image3.src = "images/optimize_blur.jpg";

roll3 = new Image();
roll3.src = "images/optimize.jpg";

function swap() {
if (document.images){
for (var x=0;
x<swap.arguments.length;
x+=2) {
document[swap.arguments[x]].src = eval(swap.arguments[x+1] + ".src");
}
}
}