title: Clear the value in a datetimepicker field
body: <p>I'm sure this is simple and it's my understanding of jquery/javascript that is holding me back - but I can't get this to work.</p>
  
  <p>All I need to do - is - When a button on the screen is clicked, clear some of the input field on the form back to their original values.</p>
  
  <p>This is working fine, for all fields except a datetimepicker field.</p>
  
  <p>Here is the relevant bits of code, that defines the input field :</p>
  
  <pre><code>&lt;div class='form-group' id='START_DATEFormGroup'&gt;    
  &lt;label for='START_DATE' class='col-sm-2 control-label' data-toggle='tooltip' data-placement='top' title=''&gt;Start Date&lt;/label&gt;
  &lt;div class='col-sm-8'&gt;
  &lt;div class='input-group date form_date col-sm-3'  data-date-format='dd M yyyy' data-link-field='START_DATE' data-link-format='yyyy-mm-dd'&gt;
  &lt;input class='form-control' size='16' type='text'  /&gt;
  &lt;input type='hidden' id='START_DATE' name='START_DATE' /&gt;
  &lt;span class='input-group-addon'&gt;
  &lt;span class='glyphicon glyphicon-calendar'&gt;
  &lt;/span&gt; // group-addon
  &lt;/span&gt; // calendar
  &lt;/div&gt; // form_date
  &lt;/div&gt; // col-sm-8
  &lt;/div&gt; // form-group
  </code></pre>
  
  <p>I am initializing datetimepicker as follows : </p>
  
  <pre><code>function enableDatepicker(){
      $( document ).ready(function() { 
           $('.form_date').datetimepicker({
              format: 'dd M yyyy',
              minView: 2,
              autoclose: 1,
              })
      });
  } 
  </code></pre>
  
  <p>To clear the input fields down I have :</p>
  
  <pre><code>function clearActionForm(){
       // code here to clear the various input fields to null or their initial values.
       // Need statements to clear the datetimepicker field to null.
  
  }
  </code></pre>
  
  <p>So, can someone give me the line(s) of code I need to insert into clearActionForm() in order to clear the START_DATE field to null.</p>
  
  <p>Thanks.</p>