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) {
		menu_service_over = newImage("images/menu_service_over.gif");
		menu_tele_over = newImage("images/menu_tele_over.gif");
		menu_data_over = newImage("images/menu_data_over.gif");
		menu_inet_over = newImage("images/menu_inet_over.gif");
		menu_bank_over = newImage("images/menu_bank_over.gif");

		menu1_about_over = newImage("images/menu1_about_over.gif");
		menu1_net_over = newImage("images/menu1_net_over.gif");
		menu1_services_over = newImage("images/menu1_services_over.gif");
		menu1_press_over = newImage("images/menu1_press_over.gif");
		menu1_clients_over = newImage("images/menu1_clients_over.gif");
		menu1_social_over = newImage("images/menu1_social_over.gif");

		preloadFlag = true;
	}
}