$(document).ready(function() {
    // extend the default setting to always sort on the first column 
    $.tablesorter.defaults.sortList = [
        [0, 0]
    ];

    var newheader = {
        1: {
            sorter: false
        },
        4: {
            sorter: false
        }
    };

    $(".tablesorter").tablesorter({
        headers: newheader
    });


});

Setting Validate Copy Format

table.tablesorter {
  background-color: #CDCDCD;
  font-family: arial;
  font-size: 8pt;
  margin: 10px 0 15px;
  text-align: left;
  width: 100%;
}
table.tablesorter thead tr .header {
  background-image: url("http://tablesorter.com/themes/blue/bg.gif");
  background-position: right center;
  background-repeat: no-repeat;
  cursor: pointer;
}
table.tablesorter thead tr th, table.tablesorter tfoot tr th {
  background-color: #E6EEEE;
  border: 1px solid #FFFFFF;
  font-size: 8pt;
  padding: 4px;
}
table.tablesorter {
  font-family: arial;
  font-size: 8pt;
  text-align: left;
}

Setting Validate Copy Format

<script src="http://tablesorter.com/__jquery.tablesorter.js" type="text/javascript">
</script>
<table class="tablesorter" cellspacing="1">
  
  <thead>
    >
    
    <tr>
      
      <th>
        first name
      </th>
      
      <th>
        last name
      </th>
      
      <th>
        age
      </th>
      
      <th>
        total
      </th>
      
      <th>
        discount
      </th>
      
      <th>
        date
      </th>
      
    </tr>
    
  </thead>
  
  <tbody>
    
    <tr>
      
      <td>
        peter
      </td>
      
      <td>
        parker
      </td>
      
      <td>
        28
      </td>
      
      <td>
        $9.99
      </td>
      
      <td>
        20%
      </td>
      
      <td>
        jul 6, 2006 8:14 am
      </td>
      
    </tr>
    
    <tr>
      
      <td>
        john
      </td>
      
      <td>
        hood
      </td>
      
      <td>
        33
      </td>
      
      <td>
        $19.99
      </td>
      
      <td>
        25%
      </td>
      
      <td>
        dec 10, 2002 5:14 am
      </td>
      
    </tr>
    
    <tr>
      
      <td>
        clark
      </td>
      
      <td>
        kent
      </td>
      
      <td>
        18
      </td>
      
      <td>
        $15.89
      </td>
      
      <td>
        44%
      </td>
      
      <td>
        jan 12, 2003 11:14 am
      </td>
      
    </tr>
    
    <tr>
      
      <td>
        bruce
      </td>
      
      <td>
        almighty
      </td>
      
      <td>
        45
      </td>
      
      <td>
        $153.19
      </td>
      
      <td>
        44%
      </td>
      
      <td>
        jan 18, 2001 9:12 am
      </td>
      
    </tr>
    
    <tr>
      
      <td>
        bruce
      </td>
      
      <td>
        evans
      </td>
      
      <td>
        22
      </td>
      
      <td>
        $13.19
      </td>
      
      <td>
        11%
      </td>
      
      <td>
        jan 18, 2007 9:12 am
      </td>
      
    </tr>
    
  </tbody>
  
</table>

Copy Format

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