JavaScriptException: (TypeError): Object [object Object] has no method 'push'

[tomas schroeder]

this is my code:

	public void onModuleLoad() {
		// Check login status using login service.
		LoginServiceAsync loginService = GWT.create(LoginService.class);
		loginService.checkLogin(GWT.getHostPageBaseURL(), new AsyncCallback<Boolean>() {
			public void onFailure(Throwable error) {
			}

			public void onSuccess(Boolean isLoggedIn) {
				if (isLoggedIn) {
					loadMainMenu();
				} else {
					loadLogin();
				}
			}
		});
		
		RootLayoutPanel.get().add(main);
	}
	public void loadLogin() {
		main.clear();
		LoginWindow loginPage = new LoginWindow(new EnterHandler());
		main.add(loginPage, DockPanel.CENTER);
	}
	public void loadMainMenu() {
		main.clear();
		MainMenuWindow mainMenuPage = new MainMenuWindow(new ExitHandler());
		main.add(mainMenuPage, DockPanel.CENTER);
	}

First of all LoginWindow and MainMenuWindow are actually Panels (com.gwtext.client.widgets.Panel).
The Exception accurs when the second panel is created, Doesnt matter what the order is.

What I am looking to achive, is moving from the login screen to the mainmenu screen.
How do I do this..?
do I redirect the url? do I change panels?
How do I associate a GWT window to a certain URL? except for using the entry point..

I`m guesing that my problem is in the design.

[Maneesh Godbole]

Welcome to the Ranch.
In future while posting code, please UseCodeTags. I have added them in your original post. As you can see they make the code much more easier to read and understand.

The Exception accurs when the second panel is created, Doesnt matter what the order is.

Can you paste the stack trace?

[tomas schroeder]

I Dont need Help, But thanks anyways.
I Have found the Problem:
It seems the problem is only on the Panel Class, And when using panels that extends that class, Any one of the meny class`s seem to work good.

I dont fully under stand the reason, but I this seems to be the solution.