title: jQuery-Validation-Engine - combin with FormData send method
body: <p>I am using the jQuery FormData method for submitting a form and would like to combine it with the jQuery-Validation-Engine.</p>
  
  <p>My code:</p>
  
  <pre><code>$(document).ready(function() {
  
      $("#myform").validationEngine(); 
  
      $(':submit').click(function(e){
          e.preventDefault();
  
  
          var formData = new FormData($('#myform')[0]);
          $.ajax({
              url: 'upload.php',
              type: 'POST',
              xhr: ...
              beforeSend: beforeSendHandler,
              success: completeHandler,
              error: errorHandler,
              data: formData,
              cache: false,
              contentType: false,
              processData: false
          });
  
      });
  
  
  
      function beforeSendHandler() { 
  
      }
  </code></pre>
  
  <p>With the above code, validation works when changing from input field to input field. But I need the final validation, when the user presses the submit button.
  And submitting should be stop if there is a validation error. </p>
  
  <p>So, how do I integrate that feature? (Since this FormData actions seem to overwrite the validationEngine.)</p>