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) {
		button_about_over = newImage("images/button-about-over.gif");
		button_news_over = newImage("images/button-news-over.gif");
		button_services_over = newImage("images/button-services-over.gif");
		button_geography_over = newImage("images/button-geography-over.gif");
		button_online_over = newImage("images/button-online-over.gif");
		button_contacts_over = newImage("images/button-contacts-over.gif");
		ru_flag_over = newImage("images/ru-flag-over.gif");
		gb_flag_over = newImage("images/gb-flag-over.gif");
		de_flag_over = newImage("images/de-flag-over.gif");
		it_flag_over = newImage("images/it-flag-over.gif");
		up_over = newImage("images/up-over.gif");
		mainpage_over = newImage("images/mainpage-over.gif");
		pin2_over = newImage("images/pin2-over.gif");
		preloadFlag = true;
	}
}