How to defeat browser dialog popup when calling Wicket setResponsePage() from modal window?

Question

How to defeat IE and Firefox dialog popup when trying to setResponsePage() from a wicket modalWindow per below. Dialog popup demands an answer to: "This page is asking you to confirm that you want to leave - data you have entered may not be saved."

    AjaxLink signInContainer = new AjaxLink("signInContainer") {
        @Override
        public void onClick(AjaxRequestTarget target) {
            target.appendJavascript("Wicket.Window.unloadConfirmation = false;");

            modalWindow.close(target);
            setResponsePage(SignInPage.class);
            modalWindow.close(target);
        }
    };

-Rich

Answer 1

In wicket 6.x and above you can simply set showUnloadConfirmation to false:

final ModalWindow modalWindow = new ModalWindow("modalWindow");
modalWindow.showUnloadConfirmation(false);