anchor.diff:  </div>
   <script type="text/javascript">
     $(document).ready(function() {
  -    $('.notes_popover').popover({trigger: 'hover', html: true, placement: 'bottom', delay: {hide: 100} });
  -// add button handlers
  -    //addButtonHandlers();
  -    //addSelectionChangeListeners();
  +    $('.notes_popover, .source_popover').popover({trigger: 'hover', html: true, placement: 'bottom', delay: {hide: 100} });
     });
   </script>
  
positive.code:             <% if @results[:include_references] %>
                <td>
                  <% if continuous_value %>
                    <span class="notes_popover" rel="popover" data-content="<%= continuous_value.source_reference %>" data-original-title="Source">
                    <%= truncate(continuous_value.source_reference.to_s) %>
                  <% end %>
                </td>
  
negative.code:             <% if @results[:include_references] %>
              <td>
                <% if categorical_value %>
                    <span class="source_popover" rel="popover" data-content="<%= categorical_value.source_reference %>" data-original-title="Source">
                    <%= truncate(categorical_value.source_reference.to_s) %>
                <% end %>
              </td>
  