title: Validate select2 plugin with multiple=true
body: <p>I am trying to validate select2 plugin with Jquery validation from last few days....it works with sinlge element selection...but when i put multiple="true" it doesn't work.... check here my code...</p>
  
  <pre><code>&lt;select name="Class[]" id="Class" multiple="multiple"&gt;
  &lt;option value="1"&gt;Class 1&lt;/option&gt;
      &lt;option value="2"&gt;Class 2&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>Here the field "Class" is using Select2 plugin with multiple="multiple" by using following code:</p>
  
  <pre><code>$("#Class").select2();
  $('#Class').select2({placeholder: "Select"}); 
  </code></pre>
  
  <p>It is working fine.
  Now i want to validate it using following code: </p>
  
  <pre><code>&lt;script type="text/javascript"&gt;
  $(document).ready(function() {
  $("input, textarea, select").not('.nostyle').uniform();
  $("#FormName").validate({
      ignore: 'input[type="hidden"]',
      rules: {
          Class: {
              required: true,
          }
      },
      messages: {
          Class: {
              required: "Please select atleast one!!",
          }
      }   
  });
  });
  &lt;/script&gt;
  </code></pre>
  
  <p>It is not validating above "class" field!!</p>