title: jquery validation engine for file upload validation when i used jasny bootstrap file upload
body: <p>I am using the jQuery validation engine plugin by pos-absolute.</p>
  
  <p>I have a plugin that hides a input type="file" and replaces it with a button.</p>
  
  <p>This works fine, if there is not file selected then jquery validation engine not shown popup message, it is submit successfully .</p>
  
  <p>The issue I have is that no popup is shown and not validate file upload field when field is empty.</p>
  
  <p>Here is my hard coded html:</p>
  
  <pre><code>&lt;div class="fileupload fileupload-new" data-provides="fileupload" id="question_choice_image" style="display:none;"&gt;
  &lt;div class="fileupload-preview thumbnail"   id="question_choice_image" style="width: 70px; height: 30px;"&gt;&lt;/div&gt;
  &lt;div &gt;
  &lt;span class="btn btn-file"&gt;&lt;span class="fileupload-new"&gt;Select image&lt;/span&gt;&lt;span class="fileupload-exists"&gt;Change&lt;/span&gt;&lt;input type="file" data-validation-engine="validate[required]"  data-errormessage-value-missing="Question is required!"  name="question_choice_img" /&gt;&lt;/span&gt;
  &lt;a href="#" class="btn fileupload-exists" data-dismiss="fileupload"&gt;Remove&lt;/a&gt;
  </code></pre>
  
  <p>
  
  So the structure is there so I can validate file upload filed .</p>