jqgrid里面的触发器只能触发一次，有没有办法能够解决？

//修改

        function update(rowid) {

            if (rowid != null) {

                var rowObject = $("#myTab").jqGrid('getRowData', rowid);

                var term = rowObject.termYear;

                var yeardate = textList(term, "YEAR");

                var quarterdate = textList(term, "QUARTER");

                var monthdate = textList(term, "MONTH");

                $("#myTab").setColProp("termYear", { editoptions: { value: yeardate} });

                $("#myTab").setColProp("termQuarter", { editoptions: { value: quarterdate} });

                $("#myTab").setColProp("termMonth", { editoptions: { value: monthdate} });



                $("#myTab").jqGrid('editRow', rowid, true);

                $("#myTab").setColProp(

                        "op",

                        {

                            formatter: function updFormatter() {

                                return '<a href="#" onclick=javascript:upd("' + rowid + '") >保存</a> '

                                      + '<a href="#" onclick=javascript:cancel()>取消</a>';

                            }

                        });

                $("#myTab").jqGrid('editRow', rowid, true);

                jQuery('#myTab').setRowData(rowid, {

                    op: ''

                });



                $("#" + rowid + "_termYear").change(function () {

                    var tempTerm = $("#" + rowid + "_termYear").val();

                    var tempyeardate = textList(tempTerm, "YEAR");

                    var tempquarterdate = textList(tempTerm, "QUARTER");

                    var tempmonthdate = textList(tempTerm, "MONTH");

                    $("#myTab").setColProp("termYear", { editoptions: { value: tempyeardate} });

                    $("#myTab").setColProp("termQuarter", { editoptions: { value: tempquarterdate} });

                    $("#myTab").setColProp("termMonth", { editoptions: { value: tempmonthdate} });

                    //$("#" + rowid + "_termYear").

                    getSysConfig();

                    $("#myTab").jqGrid('editRow', rowid, true);

                });

                var rowObject = $("#myTab").jqGrid('getRowData', rowid);

                return;

            } else {

                alert("取值异常");

                return false;

            }

            return false;

        }