Question

If the table id is known – so the table can be obtained with docoument.getElementById(table_id) – how can I append a TR element to that table in the easiest way?

The TR is as follows:

<tr><td><span>something here..</span></td></tr>

Answer 1

The first uses DOM methods, and the second uses the non-standard but widely supprted innerHTML

var tr = document.createElement("tr");
var td = document.createElement("td");
var span = document.createElement("span");
var text = document.createTextNode("something here..");
span.appendChild(text);
td.appendChild(span);
tr.appendChild(td);

tbody.appendChild(tr);

OR

tbody.innerHTML +=  "<tr><td><span>something here..</span></td></tr>"