title: Multi Select Custom Validation Rule
body: <p>I'm trying to create a custom validation rule to ensure that at least one selection is made within a select with the multiple attribute. I have a jsfiddle showing what I have at this point but I can't get the validation rule to fire. I have included the jQuery script that is translating the select just in case this might be casing my issue. My code is in the document ready section at the bottom of the JavaScript window. The jsfiddle is here: <a href="https://jsfiddle.net/7bkz58cy/25/" rel="nofollow">https://jsfiddle.net/7bkz58cy/25/</a></p>
  
  <pre><code>$.validator.addMethod('multiSelectRequired', function (value, element) {
      return element.length &gt; 0;
  }, 'One selection required.');
  
  $('#activity-dialog-form').validate({
      rules: {
          FacilityList: { multiSelectRequired: true }
      }
  });
  </code></pre>
  
  <p>I can't figure out why the validation isn't firing. Can someone please point out what I'm missing.</p>