未捕获的引用错误: 未定义打开

我从数据表向下钻取表的教程中复制了代码，但出现此错误。数据表出现得很好，但是当我单击该行时，它有未捕获的引用错误：未定义打开。我不知道如何定义它，以及定义什么。它应在数据表行下方显示一行。

$(document).ready(function () {
var oTable = $('#table_id').dataTable();
$('#table_id tbody tr').live('click', function () {
    var nTr = this.parentNode;
    var i = $.inArray(nTr, anOpen);
    if (i === -1) {
        $('img', this).attr('src', sImageUrl + "details_close.png");
        oTable.fnOpen(nTr, fnFormatDetails(oTable, nTr), 'details');
        anOpen.push(nTr);
    }
    else {
        $('img', this).attr('src', sImageUrl + "details_open.png");
        oTable.fnClose(nTr);
        anOpen.splice(i, 1);
    }
});
function fnFormatDetails(oTable, nTr) {
    var oData = oTable.fnGetData(nTr);
    var sOut =
'<div class="innerDetails">' +
  '<table cellpadding="5" cellspacing="0" border="0" style="padding-left:50px;">' +
    '<tr><td>Rendering engine:</td><td>' + oData.calldate + '</td></tr>' +
    '<tr><td>Browser:</td><td>' + oData.recordingfile + '</td></tr>' +
    '<tr><td>Platform:</td><td>' + oData.uniqueid + '</td></tr>' +
    '<tr><td>Version:</td><td>' + oData.clid + '</td></tr>' +
    '<tr><td>Grade:</td><td>' + oData.did + '</td></tr>' +
  '</table>' +
'</div>';
    return sOut;
}

$('#startdate').bind("change paste keyup", function () {
    var startdatetext = $('#startdate').val();
    startdatetext.replace("_", '');
    var startlength = startdatetext.length;
    console.log(startlength);
    if (startlength == 10 || startlength == 0) {
        $('#table_id').dataTable().fnDraw();
    }
});
$('#enddate').bind("change paste keyup", function () {
    var enddatetext = $('#enddate').val();
    enddatete = enddatetext.replace("_", '');
    var endlength = enddatetext.length;
    console.log(endlength);
    if (endlength == 10 || endlength == 0) {
        $('#table_id').dataTable().fnDraw();
    }
});
$('#csearchtext').bind("change paste keyup", function () {
    var input = $('#csearchtext').val();
    var dropdownindex = $("select[name='columnlist'] option:selected").index();
    var radioselected = $("input:radio[name='group2']:checked").val();
    var searchpattern = '';
    switch (radioselected) {
        case '1':
            searchpattern = '^' + input;
            break;
        case '2':
            searchpattern = input;
            break;
        case '3':
            searchpattern = input + '$';
            break;
    }
    $('#table_id').dataTable().fnFilter(searchpattern, dropdownindex + 1, true, true, true, false);
});
$('#columnlist').on('change', function () {
    $('#table_id').dataTable().fnFilterClear();
});
$('#dblist').on('change', function () {
    var selected = $('#dblist').find(":selected").text();
    tablefill(selected);
});
$('#search').click(function () {
    var selected = $('#dblist').find(":selected").text();
    tablefill(selected);
});
function tablefill(selected) {
    $('.advsearchbar').show();
    $('#stable').show();
    $('#table_id').dataTable({
        "sAjaxSource": '/php/connect/searchtablequery.php',
        "bProcessing": true,
        "sScrollY": "500px",
        "bDeferRender": true,
        "bDestroy": true,
        "sAjaxDataProp": "",
        "fnServerParams": function (aoData) {
            aoData.push({ "name": "db", "value": selected });
        },
        "aoColumns": [
            { "mData": "calldate" },
            { "mData": "recordingfile" },
            { "mData": "uniqueid" },
            { "mData": "clid" },
            { "mData": "did" },
            { "mData": "lastapp" },
            { "mData": "dst" },
            { "mData": "disposition" },
            { "mData": "duration_in_mins_and_secs" }, ],
        "iDisplayLength": 20,
        "bJQueryUI": true,
        "sPaginationType": "full_numbers",
        "sDom": '<"H"Tfr>t<"F"ip>',
        "oTableTools": {
            "sSwfPath": "/DataTables/extras/TableTools/media/swf/copy_csv_xls_pdf.swf",
            "aButtons": [
                "copy", "csv", "xls", "pdf",
                {
                    "sExtends": "collection",
                    "sButtonText": "Save",
                    "aButtons": ["csv", "xls", "pdf"]
                }]
        }
    });
}
});