Validate Plugin - Adding a promo message

Validate Plugin - Adding a promo message

I want to add a promotional message when the user clicks submit if they meet some criteria which is certain postcodes. I have written the regex which is /^[TA]{2}([1-12]|17|22|25){1,2}/ The message will be something like "You have been entered into a competition to win a special gift" but I'm not sure how to add this to my script.

This is the script so far

     $(document).ready(function(){
    $("#orderForm").validate({
      onfocusout: function(element) {
         this.element(element);
      },
      rules: {
         firstName: {
            required: true,
         },
         surname: {
            required: true,
         },
         phoneNumber: {
            required: true,
         },
         streetName: {
            required: true,
         },
         city: {
            required: true,
         },
         postalCode: {
            required: true,
            shipPostalCode: true,
         },
         billEmailAddress: {
            required: true,
         },
         billPhoneNumber: {
            required: true,
         },
         promoCardNumber: {
            required: true,
            fidelityCardNumber: true,
         },
         billCardNumber: {
            required: true,
         },
         billCardType: {
            required: true,
         },
      }, //end of rules
   }); // end of validate
   }); // end of function

$.validator.addMethod('postalCode', function (value) {
      return /^[A-Z]{2}\d{1,2}\s\d{1,2}[A-Z]{2}$/.test(value);
      }, 'Please enter a valid postcode');
$.validator.addMethod('promoCardNumber', function (value) {
      return /^[A-Z]{1}([A-Z]|\d){4}\s?([A-Z]|\d){5}\s?([A-Z]|\d){3}\d{1}(\!|\&|\@|\?){1}$/.test(value);
      }, 'Please enter a valid card number');

My html is as follows:
        <form id="orderForm" method="post" action="x">
      <table id="formTable" cellpadding="5">
        <tr>
          <td>
            <h3>Shipping and Billing Information</h3>
          </td>
          <td>&nbsp;</td>
        </tr>
        <tr>
          <td><label for="firstname">First Name</label></td>
          <td><input id="firstName" type="text" name="firstName" maxlength=
          "30" /></td>
        </tr>
        <tr>
          <td><label for="surname">Surname</label></td>
          <td><input id="surname" type="text" name="surname" maxlength="30" /></td>
        </tr>
        <tr>
          <td><label for="phoneNumber">Contact Telephone Number</label></td>
          <td><input id="phoneNumber" type="text" name="phoneNumber" maxlength="30" /></td>
        </tr>
        <tr>
          <td><label for="streetName">Street Name</label></td>
          <td><input id="streetName" type="text" name="streetName" maxlength="30" /></td>
        </tr>
        <tr>
          <td><label for="city">City</label></td>
          <td><input id="city" type="text" name="city" maxlength="30" /></td>
        </tr>
        <tr>
          <td><label for="postalCode">Postal Code</label></td>
          <td><input id="postalCode" type="text" name="postalCode" maxlength="30" /></td>
        </tr>
        <tr>
          <td><label for="billEmailAddress">Email address</label></td>
          <td><input id="billEmailAddress" type="text" name="billEmailAddress" maxlength="30" /></td>
        </tr>
        <tr>
          <td><label for="billPhoneNumber">Contact Telephone Number</label></td>
          <td><input id="billPhoneNumber" type="text" name="billPhoneNumber" maxlength="30" /></td>
        </tr>
        <tr>
          <td><label for="promoCardNumber">Fidelity card</label></td>
          <td><input id="promoCardNumber" type="text" name="promoCardNumber" maxlength="30" /></td>
        </tr>
        <tr>
          <td><label for="billCardNumber">Credit Card Number</label></td>
          <td><input id="billCardNumber" type="text" name="billCardNumber" maxlength="30" /></td>
        </tr>
        <tr>
          <td><label for="billCardType">Credit Card Type</label></td>
          <td><select id="billCardType" name="billCardType">
            <option value="...">
              Choose your card...
            </option>
            <option value="visa">
              Visa
            </option>
            <option value="mastercard">
              Mastercard
            </option>
          </select></td>
        </tr>
        <tr>
          <td><label for="instructions">Instructions</label></td>
          <td>
          <textarea id="instructions" name="instructions" rows="8" cols="30">
Enter your requirements here or comments.
</textarea></td>
        </tr>
        <tr>
          <td colspan="2"><input id="submit" type="submit" name="Submit" value="Submit" />
        </td>
        </tr>
      </table>
    </form>