fullName.add(behavior);
behavior.require(Boolean.TRUE);
form.add(fullName);
TextField<String> email = new TextField<String>("email", Model.of(""));
email.add(new ParsleyEmailValidator().on("change", "cut"));
form.add(email);
TextField<String> website = new TextField<String>("website", Model.of(""));
website.add(new ParsleyUrlValidator().on("change"));
form.add(website);