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) {
		about_products_over = newImage("../images/about-products-over.png");
		about_services_over = newImage("../images/about-services-over.png");
		about_contact_over = newImage("../images/about-contact-over.png");
		quality_over = newImage("../images/quality-over.png");
		history_over = newImage("../images/history-over.png");
		locations_over = newImage("../images/locations-over.png");
		trade_over = newImage("../images/trade-over.png");
		aboutoptions_16_quality_over = newImage("../images/aboutoptions_16-quality_ove.png");
		aboutoptions_16_history_over = newImage("../images/aboutoptions_16-history_ove.png");
		aboutoptions_16_locations_over = newImage("../images/aboutoptions_16-locations_o.png");
		aboutoptions_16_trade_over = newImage("../images/aboutoptions_16-trade_over.png");
		job_over = newImage("../images/job-over.png");
		focus_over = newImage("../images/focus-over.png");
		aboutoptions_21_job_over = newImage("../images/aboutoptions_21-job_over.png");
		aboutoptions_21_focus_over = newImage("../images/aboutoptions_21-focus_over.png");
		preloadFlag = true;
	}
}