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 = false;
function preloadImages() {
	if (document.images) {
		topmenu_commitment_over = newImage("images/headermenu/topmenu_commitment-over.gif");
		topmenu_services_over = newImage("images/headermenu/topmenu_services-over.gif");
		topmenu_staff_over = newImage("images/headermenu/topmenu_staff-over.gif");
		topmenu_policies_over = newImage("images/headermenu/topmenu_policies-over.gif");
		topmenu_billings_over = newImage("images/headermenu/topmenu_billings-over.gif");
		topmenu_links_over = newImage("images/headermenu/topmenu_links-over.gif");
		topmenu_contact_over = newImage("images/headermenu/topmenu_contact-over.gif");
		preloadFlag = true;
	}
}