function menuNav(menuName,menuOff) {
		if (document.getElementById(menuName)) {
			if(document.getElementById(menuName).id == menuName) {
				Effect.BlindUp(menuName);
				document.getElementById(menuName).id = menuOff;
				return false;
			}
		}
		if (document.getElementById(menuOff)) {
			if(document.getElementById(menuOff).id == menuOff) {
				Effect.BlindDown(menuOff);
				document.getElementById(menuOff).id = menuName;
				return false;
			}
		}
	}
	function topmenuNav(subs) {
		switch (subs) {
			case "appliance_div": {
				new Effect.Fade('plumbing_div');
				new Effect.Fade('design_div');
				break;
			}
			case "plumbing_div": {
				new Effect.Fade('appliance_div');
				new Effect.Fade('design_div');
				break;
			}
			case "design_div": {
				new Effect.Fade('plumbing_div');
				new Effect.Fade('appliance_div');
				break;
			}
		}
		new Effect.Appear(subs);
	}