jqGrid动态合并列值

 $("#cbhzList").jqGrid({
                url: "${pageContext.request.contextPath}/cbfx/getCbhzList.do",
                datatype: "json",
                mtype: 'GET',
                colNames:["成本类别","费用","去年同期费用","备注"],
                colModel:[
                    {name: "cblb", align: 'center', width:120},
                    {name: "fy", align: 'center', width:100},
                    {name: "qntqFy", align: 'center', width:100},
                    {name: "", align: 'center', width:100}
                ],
                rownumbers:true,
                rowNum: 10,
                page: 1,
                footerrow:true,
        	gridComplete: completeMethod,
                total: 15,
                rowList: [10, 20, 30],
                pager: "#cbhzPager",
                viewrecords: true,
                height: "auto",
                autowidth: true,
                gridview:true,
                autoencode: true,
                multiselect: false,
                caption: "标题"
            }).navGrid("#cbhzPager", {
                refresh: false,
                edit: false,
                add: false,
                del: false,
                search: false
            });
            
            /*统计功能 */
        	function completeMethod(){
                var sum_Fy=$("#cbhzList").getCol('fy',false,'sum');
                var sum_qntqFy=$("#cbhzList").getCol('qntqFy',false,'sum');
                $("#cbhzList").footerData('set', { "cblb": '合计', fy: sum_Fy, qntqFy: sum_qntqFy });
            }
        });