s="led-yellow"></div>
                            </div>
                            <div class="led-box" id="is-browser-supported" title="Indicates if the browser is supported">
                                <div class="led-yellow"></div>
                            </div>
                        </td>
                    </tr>
                </table>
                <table id="main-controls" hidden>
                    <tr>
                        <td colspan=1>
                            Tx protocol: