container.visitChildren(FormComponent.class, new IVisitor<FormComponent, Void>() {

                    @Override
                    public void component(final FormComponent component, IVisit<Void> visit) {
                        AjaxFormComponentUpdatingBehavior behavior = new AjaxFormComponentUpdatingBehavior("onchange") {

                            @Override
                            protected void onUpdate(AjaxRequestTarget target) {
                                System.out.println("updated " + component.getPageRelativePath());
                                target.add(component);
                            }
                        };
                        System.out.println("behavior to " + component.getPath() + " " + component.getClass());
                        component.add(behavior);
                    }
                });