$(document).ready(function(){

registerForm = $("body#www-corgi-direct-com #register form");
  if (registerForm.length){
      registerForm.submit(function(){
          if ($.trim($("#register select#referrer").val()) == '' ){
              alert('Where did you find out about us?');
              return false;
          }
      });
  }

catForm = $("body#www-corgi-direct-com form#form-request-a-catalogue-add-to-mailing-list");
  if (catForm.length){
      catForm.submit(function(){
          if ($.trim($("form#form-request-a-catalogue-add-to-mailing-list input#formfield-postcode").val()) == '' ){
              alert('Please enter a Post Code');
              return false;
          }
      });
  }

});