(function($) {
			/*
			 * Function: fnGetColumnData
			 * Purpose:  Return an array of table values from a particular column.
			 * Returns:  array string: 1d data array 
			 * Inputs:   object:oSettings - dataTable settings object. This is always the last argument past to the function
			 *           int:iColumn - the id of the column to extract the data from
			 *           bool:bUnique - optional - if set to false duplicated values are not filtered out
			 *           bool:bFiltered - optional - if set to false all the table data is used (not only the filtered)
			 *           bool:bIgnoreEmpty - optional - if set to false empty values are not filtered from the result array
			 * Author:   Benedikt Forchhammer <b.forchhammer /AT\ mind2.de>
			 */
			$.fn.dataTableExt.oApi.fnGetColumnData = function ( oSettings, iColumn, bUnique, bFiltered, bIgnoreEmpty ) {
				// check that we have a column id
				if ( typeof iColumn == "undefined" ) return new Array();
				
				// by default we only wany unique data
				if ( typeof bUnique == "undefined" ) bUnique = true;
				
				// by default we do want to only look at filtered data
				if ( typeof bFiltered == "undefined" ) bFiltered = true;
				
				// by default we do not wany to include empty values
				if ( typeof bIgnoreEmpty == "undefined" ) bIgnoreEmpty = true;
				
				// list of rows which we're going to loop through
				var aiRows;
				
				// use only filtered rows
				if (bFiltered == true) aiRows = oSettings.aiDisplay; 
				// use all rows
				else aiRows = oSettings.aiDisplayMaster; // all row numbers
			
				// set up data array	
				var asResultData = new Array();
				
				for (var i=0,c=aiRows.length; i<c; i++) {
					iRow = aiRows[i];
					var aData = this.fnGetData(iRow);
					var sValue = aData[iColumn];
					
					// ignore empty values?
					if (bIgnoreEmpty == true && sValue.length == 0) continue;
			
					// ignore unique values?
					else if (bUnique == true && jQuery.inArray(sValue, asResultData) > -1) continue;
					
					// else push the value onto the result data array
					else asResultData.push(sValue);
				}
				
				return asResultData;
			}}(jQuery));
			
			
			function fnCreateSelect( aData )
			{
				var r='<select><option value="">- wybierz -</option>', i, iLen=aData.length;
				for ( i=0 ; i<iLen ; i++ )
				{
					r += '<option value="'+aData[i]+'">'+aData[i]+'</option>';
				}
				return r+'</select>';
			}
			
			
			$(document).ready(function() {
				/* Initialise the DataTable */
				var oTable = $('#example').dataTable( {
					"bPaginate": false,
					"bInfo": false,
				} );
				
				/* Add a select menu for each TH element in the table footer */
				$("#sel th").each( function ( i ) {
					this.innerHTML = fnCreateSelect( oTable.fnGetColumnData(i) );
					$('select', this).change( function () {
						oTable.fnFilter( $(this).val(), i );
					} );
				} );
			} );