SpaceAlarm,
важны детали, телепаты но пасаран
<table>
<tbody id="num">
<tr id="channel_list" class="danger"></tr>
</tbody>
</table>
<script>
var id = 2;
var tbody = document.querySelector("#num");
tbody.insertAdjacentHTML("beforeEnd", "<tr><td>ID:</td><td>" + id + "</td></tr>");
</script>