il codice html
codice:
<tableid="example"class="display"style="width:100%">                                        <thead>
                                            <tr>
                                                <th></th>
                                                <th>Name</th>
                                                <th>Position</th>
                                                <th>Office</th>
                                                <th>Salary</th>
                                            </tr>
                                        </thead>
                                        <tbody>
                                            <button id="btn" onclick="test()"> test </button>
                                        </tbody>

</table>