$.fn.dataTableExt.afnFiltering.push(
     function( oSettings, aData, iDataIndex ) {

     console.log(aData[1]);
     var ret = true;

     //Loop through all input fields i tfoot that has class 'sl_filter' attached
     $('tfoot .sl_filter').each(function(i, obj){

         //$(this) can be used. Get the index of this colum.
         var i2 = $("tfoot input").index($(this));
         i2 = oTable.fnVisibleToColumnIndex(i2);

         //Create regexp to math
         var r = new RegExp($(this).val(), "i");

         //HTML does not get updated when changing value in select, hence searching for :selected return old value
         //DataTables stores the DOM object oSettings. Hence, get the object and extract the text for the selected value.
         var tr = oSettings.aoData[ iDataIndex ].nTr;
         var id = $(aData[i2]).attr('id');

         //Get the text
         var str = "";
         var value = "";
         if($(aData[i2]).is("form")){
             value = $("#" + id + " select", tr).val();
             str = $("#" + id + " select option[value='" + value + "']", tr).text();
         }else{
             value = $("#" + id, tr).val();
             str = $("#" + id + " option[value='" + value + "']", tr).text();
         }

         /*Test to see if there is a match or if the input value is the default
            (the initial value of input before it has any fokus/text) */
         if(r.test(str) || $(this).val()=="Search"){
                 //Return true only exits this function
                 return true;
         }else{

                 /*Return false returns both function an .each. Retain 'false' in a variable scoped
                             to be reached outside the .each */
                 ret = false;
                 return false;
          }
      });
      //Return true or false
      return ret;

   }
 );

$.fn.dataTableExt.afnSortData['dom-select'] = function  ( oSettings, iColumn, iColumnVis){

    iColumn = oSettings.oApi._fnColumnIndexToVisible( oSettings, iColumn );
    var aData = [];
    $( 'td:eq('+iColumn+') select', oSettings.oApi._fnGetTrNodes(oSettings) ).each( function () {
           aData.push( $.trim($(":selected", this).text()));
    } );

    return aData;
};

str = $('td:eq(' + i2 + ') option:selected', oSettings.aoData[ iDataIndex ].nTr).text();

$.fn.dataTableExt.afnFiltering.push(
     function( oSettings, aData, iDataIndex ) {

           var ret = true;

           //Loop through all input fields i tfoot that has class 'sl_filter' attached
           $('tfoot .sl_filter').each(function(i, obj){

           //$(this) can be used. Get the index of this colum.
           var i2 = $("tfoot input").index($(this));

           //Create regexp to math
           var r = new RegExp($(this).val(), "i");

           //Get the text
           var str = $('td:eq(' + i2 + ') option:selected', oSettings.aoData[ iDataIndex ].nTr).text();

           /*Test to see if there is a match or if the input value is the default
             (the initial value of input before it has any fokus/text) */
           if(r.test(str) || $(this).val()=="Search"){
                 //Return true only exits this function
                 return true;
           }else{

                 /*Return false returns both function an .each. Retain 'false' in a variable scoped
                 to be reached outside the .each */
                 ret = false;
                 return false;
           }
         });
         //Return true or false
         return ret;
       }
    );