jQuery DataTables仅筛选特定列

我正在使用jQuery插件DataTables(http://datatables.net)用于分页、搜索功能和过滤。

有一个过滤功能(http://datatables.net/release-datatables/examples/api/multi_filter_select.html)为每列放置表单选择元素。

我的问题是，我不希望过滤器为每一列选择元素，只为一些。我修改了原始代码，因为我只想进行"是/否"筛选，并且我的第一列包含用户名。

如何从第一列中删除表单选择元素？

JavaScript:

<script type="text/javascript">
$(document).ready(function() {
(function($) {
/*
 * 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 want 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 )
{
    return '<select><option value="">Select</option><option value="Yes">Yes</option><option value="No">No</option></select>';
}
   var oTable = $('#results').dataTable({
         "sDom": '<<"filters"f><"clear"><"top"Tp><"clear">rt<"bottom"il>>',
         "iDisplayLength": 5,
         "sPaginationType": "full_numbers",
         "bSortCellsTop": true,
         "oLanguage": {
                    "sSearch": "Search all columns:"
          },
         "aoColumns": [
                null,
                { "sType": "title-string" },
                { "sType": "title-string" },
                { "sType": "title-string" },
                { "sType": "title-string" }
            ],
        "oTableTools": {
            "sSwfPath": "../../scripts/TableTools/copy_cvs_xls_pdf.swf" 
        }         
    });  

 /* Add a select menu for each TH element in the table footer */
    $("thead #filter td").each( function ( i ) {
        this.innerHTML = fnCreateSelect( oTable.fnGetColumnData(i) );
        $('select', this).change( function () {
            oTable.fnFilter( $(this).val(), i );
        } );
    } );    
} );
</script>

HTML:

<table id="results" class="display">
    <thead>
        <tr id="labels">
            <th>1</th>
            <th>2</th>
            <th>3</th>
            <th>4</th>
            <th>5?</th>
        </tr>
        <tr id="filter">
            <td>1</td>
            <td>2</td>
            <td>3</td>
            <td>4</td>
            <td>5?</td>
        </tr>
    </thead>
    <tbody>
    ...
    </tbody>
</table>