func changeViewController(menu: LeftMenu) {
        
        self.controller = MenuNavigationController()
        
        switch menu {
        case .Search:
            self.controller = MenuNavigationController(rootViewController:searchViewController)
            self.slideMenuController()?.changeMainViewController(self.controller, close: true)
            break
        case .MyAdvertisements:
            break
        case .Messages:
            let dialogsVC = dialogsStoryboard.instantiateViewController(withIdentifier: "DialogsTableViewController") as! DialogsTableViewController
            self.slideMenuController()?.changeMainViewController(dialogsVC, close: true)
            break
        case .Favourites:
            break
        case .ContactUs:
            break
        case .AddAdvertisement:
            break
        case .Exit:
            break
        default:
            break
        }
    }