SO-20051498
Add table row after 4th row
by Tushar Gupta
HTML
<table>
<tr>
<td>1</td>
</tr>
<tr>
<td>2</td>
</tr>
<tr>
<td>3</td>
</tr>
<tr>
<td>4</td>
</tr>
</table>
JavaScript
$('<tr><td>5</td></tr>').insertAfter('table tr:eq(3)');