anchor.diff:          $.post("clinicaltrials.json",
                   { keywords: keywords.join(",") },
                   function(data) {
  +                    $("#trials_wait").hide();
  +
                       for(var i=0; i < data.length; i++) {
                           var trial = data[i];
                           $("#pv-trials-table").append(
  
positive.code:    </thead>
  
  </table>
  
  
  <h2 class="pv-drugs-header">Clinical trials of interest</h2>
  
negative.code:         <th>Location</th>
      </tr>
     </thead>
  </table>
  <div id="trials_wait"><img src="images/ajax-loader.gif"/></div>
  