toggle_menu = function(menu_id) {
	var item = $("menu_" + menu_id);
	var duration = 0.2;
	if (item.visible()) {
		new Effect.BlindUp(item, {duration: duration});
	} else {
		new Effect.BlindDown(item, {duration: duration});
	}
	
}

toggle_item = function(item_id, status) {
	id = Element.immediateDescendants(item_id);
	if (status) {
		Element.addClassName(id[0],'hover');		
	} else {
		Element.removeClassName(id[0],'hover');
	}	
}