;
                $('#mount-holes-num').siblings('.error-msg').append('<div>The number of mount holes is required and must be >= 4 and an even number for the Sandwich case.</div>');
                error_els.push('#mount-holes-num');
                has_error = true;
              } else {
                data['mount-holes-num'] = holes;
              }

              if (size == '') {
                $('#mount-holes-size').addClass('ui-state-error');
                $('#mount-holes-size').siblings('.error-