$("#submitButton").click(function(){
            
            $.ajax({
                url: callbackUrl,
                type:  "POST",
                data: {
                    username: $("#username").val(),
                    email: $("#email").val(),
                },
                forceSync: true,
                async: true,

                dataType:  'html',        // 'xml', 'script', or 'json' (expected server response type)

                success: function (responseText, statusText) {
                    //alert(" успешно ");
                },

                error: function (responseText, statusText) {
                    alert(" неуспешно ");
                }
        
            });
            
    });

public final class RegistrationPage extends BasePage {
    private AbstractAjaxBehavior aabRegistration;
    
    public RegistrationPage() {
        
        aabRegistration = new AbstractAjaxBehavior() {

            @Override
            public void renderHead(Component component, IHeaderResponse response) {
                super.renderHead(component, response);
                response.renderJavaScript("var callbackUrl = '" + aabRegistration.getCallbackUrl() + "';", "callbackurl");
            }
            
                    
            
            // handle the ajax request
            
            @Override
            public void onRequest() {
                System.out.println("ajax request received");

                RequestCycle requestCycle = RequestCycle.get();
                Request request = requestCycle.getRequest();
                IRequestParameters irp = request.getRequestParameters();
                System.out.println(irp.getParameterValue("username"));
                System.out.println(irp.getParameterValue("email"));
                User user = new User();
                user.setName(irp.getParameterValue("username").toString());
                user.setEmail(irp.getParameterValue("email").toString());
                requestCycle.scheduleRequestHandlerAfterCurrent(new TextRequestHandler("application/json", "UTF-8", "tesssssst"));
                
                ////!!!!!РЕДИРЕКТ НЕ СРАБАТЫВАЕТ--->////
                requestCycle.setResponsePage(SuccessRegistrationPage.class);
                
            }
            
        };
        
        add(aabRegistration);
        
        
    }
    
}