Doc for onFocus

Author: Çağatay Çivici

showcase/demo/calendar/calendardemo.html

@@ -405,6 +405,12 @@ <h3>Events</h3>
                             </td>
                             <td>Callback to invoke on blur of input field.</td>
                         </tr>
+                        <tr>
+                            <td>onFocus</td>
+                            <td>event: Focus event
+                            </td>
+                            <td>Callback to invoke on focus of input field.</td>
+                        </tr>
                     </tbody>
                 </table>
             </div>