title: jQuery Validator -- custom method does not hide error when valid
body: <p>I have a custom validator checking a value against a database of acceptable values via an ajax request. I thought at first it wasn't hiding the error message because the request was being done asynchronously, so then it could perhaps fail to return true or false in time for the validator to recognize this.</p>
  
  <p>I turned async off and the error message still remains shown. How can I get this to go away?</p>
  
  <p>Through console logging it <strong>does</strong> return true, yet the error message still remains. I tried to explicitly hide the message, but the validator still assumes false and fails to submit.</p>
  
  <pre><code>jQuery.validator.addMethod("validZip", function(value, element){
      var _id = $(element).attr("id");
      $.ajax({
          url: '/xpress/wp-admin/admin-ajax.php',
          data: {action:"test_checkZip", zip:value},
          type:"POST",
          asyc: false,
          success: function(response){
              if (response== 0){
                  return false;
              } else {
                  //$("label[for="+_id+"][class=error]").hide();
                  return true;
              }
          } 
      });
  }, '*');
  </code></pre>