jQuery Search in specified column - tablesorter

[losporros]

how do the following??
Make your search by selecting the column

PHP Code:

 <script type="text/javascript">
        $(document).ready(function() {

            $("#campo_filtrar").change(function () 
            {
                 $("#campo_filtrar option:selected").each(function () 
                  {
                        campo_seleccionado=$(this).val();
                        alert(campo_seleccionado);
                   });        
            });

            $("#tableOne").tablesorter({ debug: false, sortList: [[0, 0]], widgets: ['zebra'] })
                        .tablesorterPager({ container: $("#pagerOne"), positionFixed: false })
                        .tablesorterFilter({ filterContainer: $("#filterBoxOne"),
                            filterClearContainer: $("#filterClearOne"),
                            filterColumns: [0], //    Search in the selected column
                            filterCaseSensitive: false
                        });
              
        });    
        
             
    </script>              

    <table>         
...........................

                Search by: <select id='campo_filtrar'/>
                <option value='0'>Name</option>
                <option value='1'>Major</option>
                <option value='2'>Sex</option>
                <option value='3'>English</option>
                <option value='4'>Japanese</option>
                <option value='5'>Calculus</option>
                <option value='6'>Geometry</option>
                       </select>
                <input type='text' id="filterBoxOne" size='30'>      
                <img id="filterClearOne" src="_assets/img/cross.png" title="Click to clear filter." alt="Clear Filter Image" /> 


http://beckelman.net/demos/jqueryTab...g/default.aspx