button id="next_frozen">&gt;</button>
            <button id="end_frozen">&gt;&gt;</button>
        </td>
    </tr>
</table>

<script type="module">
    import dh from './dh-core.js';

    const {Client} = dh;
    var url = new URL('/socket', window.location);
    if (url.protocol === 'http:') {
        url.protocol = 'ws:';
    } else {
        url.protocol = 'wss:';
    }

    window.c = new Client(url.href);
    c.addEventListener(Client.EVENT_CONNECT, () => {
        connected();
        c.login({userna