text: /**
   * Dutch phone numbers have 10 digits (or 11 and start with +31).
   */
  $.validator.addMethod(
    "phoneNL",
    function (value, element) {
      return (
        this.optional(element) ||
        /^((\+|00(\s|\s?\-\s?)?)31(\s|\s?\-\s?)?(\(0\)[\-\s]?)?|0)[1-9]((\s|\s?\-\s?)?[0-9]){8}$/.test(
          value
        )
      );
    },
    "Please specify a valid phone number."
  );
  