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 = "/img/about.jpg";

roll1 = new Image();
roll1.src = "/img/about_over.jpg";

image2 = new Image();
image2.src = "/img/services.jpg";

roll2 = new Image();
roll2.src = "/img/services_over.jpg";

image3 = new Image();
image3.src = "/img/products.jpg";

roll3 = new Image();
roll3.src = "/img/products_over.jpg";

image4 = new Image();
image4.src = "/img/maintenance.jpg";

roll4 = new Image();
roll4.src = "/img/maintenance_over.jpg";

image5 = new Image();
image5.src = "/img/estimate.jpg";

roll5 = new Image();
roll5.src = "/img/estimate_over.jpg";

image6 = new Image();
image6.src = "/img/testimonials.jpg";

roll6 = new Image();
roll6.src = "/img/testimonials_over.jpg";

image7 = new Image();
image7.src = "/img/contact.jpg";

roll7 = new Image();
roll7.src = "/img/contact_over.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");
}
}
}