function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = true;
function preloadImages() {
	if (document.images) {
		home_over = newImage("images/home-over.gif");
		medical_services_over = newImage("images/medical_services-over.gif");
		radio_iodine_over = newImage("images/radio_iodine-over.gif");
		meet_our_doctors_over = newImage("images/meet_our_doctors-over.gif");
		grooming_over = newImage("images/grooming-over.gif");
		prescription_refills_over = newImage("images/prescription_refills-over.gif");
		kitty_corner_adoption_over = newImage("images/kitty_corner_adoption-over.gif");
		kitty_bed_breakfast_over = newImage("images/kitty_bed_breakfast-over.gif");
		meet_our_cats_over = newImage("images/meet_our_cats-over.gif");
		enroll_your_cat_over = newImage("images/enroll_your_cat-over.gif");
		our_location_over = newImage("images/our_location-over.gif");
		contact_us_over = newImage("images/contact_us-over.gif");
		preloadFlag = true;
	}
}