jquery增加时编辑jqGrid(实例代码)

代码如下:
function showTestSubjectGrid() {
    $("#testSubjectGrid").jqGrid({
        url: "",
        datatype: "json",
        height: 215,
        width: 480,
        caption: "测试科目",
        autoheight: true,
        autowidth: true,
        scrollrows: false, // 是否显示行滚动条
        multiselect: true, // 是否显示复选框
        hidegrid: false, //取消Grid的收缩
        postData: {
            strJson: testsubjectData
        },
        colNames: ['', '测试科目', '开始时间', '结束时间', '场次', ],
        colModel: [
        {
            name: 'data',
            index: 'data',
            hidden: true
        }, {
            name: 'display_content',
            index: 'display_content',
            width: 100,
            editable: true,
            align: 'left'
        }, {
            name: 'exam_startTime',
            index: 'exam_startTime',
            width: 110,
            editable: true,
            align: 'center'
        }, {
            name: 'exam_EndTime',
            index: 'exam_EndTime',
            width: 110,
            editable: true,
            align: 'center'
        }, {
            name: 'exam_turn',