function swapImage (elId, newState) {
	document.getElementById (elId).src = preloadedImages[elId+"_"+newState].src;
}

var preloadedImages = new Array ();

preloadedImages["menu_home_off"] = new Image (81, 50);
preloadedImages["menu_home_off"].src = "skin1/images/menu_home_off.gif";

preloadedImages["menu_home_on"] = new Image (81, 50);
preloadedImages["menu_home_on"].src = "skin1/images/menu_home_on.gif";

preloadedImages["menu_ourstory_off"] = new Image (109, 50);
preloadedImages["menu_ourstory_off"].src = "skin1/images/menu_about_off.gif";

preloadedImages["menu_ourstory_on"] = new Image (109, 50);
preloadedImages["menu_ourstory_on"].src = "skin1/images/menu_about_on.gif";

preloadedImages["menu_shopproducts_off"] = new Image (179, 50);
preloadedImages["menu_shopproducts_off"].src = "skin1/images/menu_products_off.gif";

preloadedImages["menu_shopproducts_on"] = new Image (179, 50);
preloadedImages["menu_shopproducts_on"].src = "skin1/images/menu_products_on.gif";

preloadedImages["menu_contact_off"] = new Image (242, 50);
preloadedImages["menu_contact_off"].src = "skin1/images/menu_contact_off.gif";

preloadedImages["menu_contact_on"] = new Image (242, 50);
preloadedImages["menu_contact_on"].src = "skin1/images/menu_contact_on.gif";

preloadedImages["menu_service_off"] = new Image (242, 50);
preloadedImages["menu_service_off"].src = "skin1/images/menu_ourservice_off.gif";

preloadedImages["menu_service_on"] = new Image (242, 50);
preloadedImages["menu_service_on"].src = "skin1/images/menu_ourservice_on.gif";