问使用DataTables添加数据范围过滤下拉列表

EN

$.fn.dataTableExt.afnFiltering.push(
  function(oSettings, aData, iDataIndex) {
    if (typeof $('#duration').val() !== "undefined") {
      var duration = $('#duration').val();
      var durationBits = duration.split(" ");
      var durationInt = ~~durationBits[0];
      var durationString = durationBits[1];
      var now = moment("2013/08/11", "YYYY/MM/DD");
      var targetDate = now.subtract(durationInt, durationString);
      var iDateCol = 4;
      var colDate = aData[iDateCol];
      if (duration === "All") {
        return true;
      } else {
        return moment(colDate, "YYYY/MM/DD").isSameOrAfter(targetDate);
      }
    } else {
      return true;
    }
  }
);