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) {
		ui_nav_contact_18 = newImage("image/ui-nav-contact_18.gif");
		ui_nav_employment_2 = newImage("image/ui-nav-employment_2.gif");
		ui_nav_links_2 = newImage("image/ui-nav-links_2.gif");
		ui_nav_products_2 = newImage("image/ui-nav-products_2.gif");
		ui_nav_calendar_2 = newImage("image/ui-nav-calendar_2.gif");
		ui_nav_qualityAssurance_2 = newImage("image/ui-nav-qualityAssurance_2.gif");
		ui_nav_services_2 = newImage("image/ui-nav-services_2.gif");
		ui_nav_about_2 = newImage("image/ui-nav-about_2.gif");
		ui_nav_onsiteService_2 = newImage("image/ui-nav-onsiteService_2.gif");
		ui_nav_mailin_2 = newImage("image/ui-nav-mailin_2.gif");
		preloadFlag = true;
	}
}