                 </td>
                                </tr>
                                  <tr>
                                    <td>on-click</td>
                                    <td>function</td>
                                    <td>on-click is a callback function, which returns the click co-ordinates and the value for the corresponding co-ordinates. The click co-ordinates returned are with respect to the heat map container/div and not the viewport.
                                    The cal