disabling ajax submit button

[Anna Simbirtsev]

Hi

I am trying to disable ajax submit button after it has been clicked.

AjaxSubmitLink  submitButton1 =  new AjaxSubmitLink("submitButton1") {

            private static final long serialVersionUID = 1L;


            protected void onSubmit(AjaxRequestTarget target, final Form<?>
form)
            {
                submitButton1.add(
                        new SimpleAttributeModifier("disabled",
"disabled"));

                target.addComponent(submitButton1);
            }


This does not work.:(