[jQuery] skipping over some while using tableSorter plugin

[Bhaarat Sharma]

Hello

I have a table like this

http://i32.tinypic.com/287oolg.jpg

from the pic...3, 4 and 5 are all <th> but all have columns underneath
them, and the underneath columns are the ones that need sorting.

If i use tableSorter plugin then it is adding sorting capability to
all <th> tags.  Is there any way to 'skip' certain <th> tags??

This is the code that i am using for table sorter.
                        $("#myTable").tablesorter({

                            cssAsc: 'headerSortUp1',
                            cssDesc: 'headerSortDown1',
                            cssHeader: 'header',
                            widgets: ['zebra'],

                            sortList: [[0,0]],
                            headers: {
                                1:  {
                                        sorter:'nums'
                                    },
                                3:  {
                                        sorter:'nums'
                                    },
                                5:  {
                                        sorter:'nums'
                                    },
                                6:  {
                                        sorter:'nums'
                                    },

                                8:  {
                                        sorter:'nums'
                                    },
                                10:  {
                                        sorter:'nums'
                                    },

                                12:  {
                                        sorter:'nums'
                                    }

                            }

and code for my table is as follows
<table>
  <caption>Table title</caption>
  <thead>
    <tr>
      <th rowspan="3">1</th>
      <th rowspan="3">2</th>
      <th colspan="2">3</th>
      <th colspan="7">4</th>
      <th colspan="4">5 members</th>
    </tr>
    <tr>
      <th rowspan="2">3a</th>
      <th rowspan="2">3b</th>
      <th rowspan="2">4a</th>
      <th colspan="2">4b</th>
      <th colspan="4">4c</th>
      <th rowspan="2">5a</th>
      <th rowspan="2">5b</th>
      <th rowspan="2">5c</th>
      <th rowspan="2">5d</th>
    </tr>
    <tr>
      <th>4ba</th>
      <th>4bb</th>
      <th>4ca</th>
      <th>4cb</th>
      <th>4cc</th>
      <th>4cd</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td></td>
      <!--total of 15 <td>'s-->
    </tr>
  </tbody>
</table>

I'd appreciate any help!