function formCallback(result, form) {
		window.status = "valiation callback for form '" + form.id + "': result = " + result;
	}
	
	var valid = new Validation('apply_newsletter', {immediate : true, onFormValidate : formCallback, useTitles : true});
			
	Validation.addAllThese([
		['verplicht', 'Dit is een verplicht veld.', function(v) {
				return !Validation.get('IsEmpty').test(v);
		}]
	]);