Each <th> has the type in the attribute, like this:
<table id="grid">
<thead>
<tr>
<th data-type="number">Age</th>
<th data-type="string">Name</th>
</tr>
</thead>
<tbody>
<tr>
<td>5</td>
<td>John</td>
</tr>
<tr>
<td>10</td>
<td>Ann</td>
</tr>
...
</tbody>
</table>
In the example above the first column has numbers, and the second one – strings. The sorting function should handle sort according to the type.
Only "string" and "number" types should be supported.
The working example:
P.S. The table can be big, with any number of rows and columns.