top'</td>
               <td>how to position the tooltip - top | bottom | left | right</td>
             </tr>
             <tr>
               <td>selector</td>
               <td>string</td>
               <td>false</td>
               <td>If a selector is provided, tooltip objects will be delegated to the specified targets.</td>
             </tr>
             <tr>
               <td>title</td>
               <td>string | function</td>
               <td>''</td>
               <td>default title value if 