try this
<table>
<tr>
<td>
<div style="position: absolute;">
<table>
<tr>
<td>
want to make moveable if scrollabar move
</td>
</tr>
</table>
</div>
</td>
</tr>
<tr>
<td>
This td content overlapping the above td content
</td>
</tr>
</table>
still if you are not getting with this code reply me i will get back to you