if (document.images) {
	about_en_on = new Image();
	about_en_on.src = "gfx/menu/about_en_on.jpg";
	about_en_off = new Image();
	about_en_off.src = "gfx/menu/about_en_off.jpg";

	buildings_en_on = new Image();
	buildings_en_on.src = "gfx/menu/buildings_en_on.jpg";
	buildings_en_off = new Image();
	buildings_en_off.src = "gfx/menu/buildings_en_off.jpg";

	contact_hu_on = new Image();
	contact_hu_on.src = "gfx/menu/buildings_rent_en_on.jpg";
	contact_hu_off = new Image();
	contact_hu_off.src = "gfx/menu/buildings_rent_en_off.jpg";

	contact_en_on = new Image();
	contact_en_on.src = "gfx/menu/contact_en_on.jpg";
	contact_en_off = new Image();
	contact_en_off.src = "gfx/menu/contact_en_off.jpg";

	error_report_en_on = new Image();
	error_report_en_on.src = "gfx/menu/error_report_en_on.jpg";
	error_report_en_off = new Image();
	error_report_en_off.src = "gfx/menu/error_report_en_off.jpg";

	services_en_on = new Image();
	services_en_on.src = "gfx/menu/services_en_on.jpg";
	services_en_off = new Image();
	services_en_off.src = "gfx/menu/services_en_off.jpg";

}