[jQuery] Need a help to manipulate table that multiple rowspan

[Peter]

Hi All,

How can I find rowspan attribute of parent TR when I am clicking on
last indexed tr.

<table>

<tr>
    <td rowspan="4"><div style="text-align: left; width: 180px;">DG 1</
div></td>
    <td><div style="text-align: left; width: 180px;"> M1</div></td>
</tr>

<tr class="erow">
<td><div style="text-align: left; width: 180px;">M3</div></td>
</tr>
<tr>
<td><div style="text-align: left; width: 180px;">M4</div></td>
</tr>
<tr class="erow trSelected">
<td><div style="text-align: left; width: 180px;"> M5 </div></td>
</tr>

</table>

Here M5 is the last index row. from that i have to get rowspan
(rowspan="4") attribute of first / nearest  td.

Please help.

Thanks
Peter