<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<table cellspacing="0" cellpadding="0" border="0" width="325">
<tr>
<td>
<table cellspacing="0" cellpadding="1" border="1" width="300" >
<tr>
<th>col 1 heading</th>
<th>col 2 heading</th>
</tr>
</table>
</td>
</tr>
<tr>
<td>
<div style="width:325px; height:48px; overflow:auto;">
<table cellspacing="0" cellpadding="1" border="1" width="300" >
<tr>
<td>col 1 data 1</td>
<td>col 2 data 1</td>
</tr>
<tr>
<td>col 1 data 2</td>
<td>col 2 data 2</td>
</tr>
<tr>
<td>col 1 data 3</td>
<td>col 2 data 3</td>
</tr>
</table>
</div>
</td>
</tr>
</table>
