/**

        * EasyUI DataGrid根据字段动态合并单元格

        * @param fldList 要合并table的id

        * @param fldList 要合并的列,用逗号分隔(例如："name,department,office");

        */

        function MergeCells(tableID, fldList) {

            var Arr = fldList.split(",");

            var dg = $('#' + tableID);

            var fldName;

            var RowCount = dg.datagrid("getRows").length;

            var span;

            var PerValue = "";

            var CurValue = "";

            var length = Arr.length - 1;

            for (i = length; i >= 0; i--) {

                fldName = Arr[i];

                PerValue = "";

                span = 1;

                for (row = 0; row <= RowCount; row++) {

                    if (row == RowCount) {

                        CurValue = "";

                    }

                    else {

                        CurValue = dg.datagrid("getRows")[row][fldName];

                    }

                    if (PerValue == CurValue) {

                        span += 1;

                    }

                    else {

                        var index = row - span;

                        dg.datagrid('mergeCells', {

                            index: index,

                            field: fldName,

                            rowspan: span,

                            colspan: null

                        });

                        span = 1;

                        PerValue = CurValue;

                    }

                }

            }

        }

<table id="DataGrid" class="easyui-datagrid" fit="true" border="false" toolbar="#TBar" pagination="true"

          data-options="autoRowHeight:false,pageSize:50,pageList: [10, 20, 30, 40, 50,100,5000],idField:'zhbid',sortName:'zhbbh', queryParams: { 'action': 'query'}

          ,onLoadSuccess:function(data){ MergeCells('DataGrid','mkmch,zhbmch');},onDblClickRow: onClickRow"

          rownumbers="true" singleSelect="true" url="../Source/Data/zhbdata.ashx?mxbs=MON">

        <thead>

            <tr>

                <th field="zhbid" hidden="true" sortable="true" width="100"  rowspan="2">指标ID</th>

                <th field="zhbbs" hidden="true" sortable="true" width="100" rowspan="2">指标ID</th>

                <th field="mxid" hidden="true" sortable="true" width="100" rowspan="2">模块ID</th>

                <th field="dwid" hidden="true" sortable="true" width="100" rowspan="2">单位ID</th>

                <th field="rq" hidden="true" sortable="true" width="100" rowspan="2">日期</th> 

                <th field="mkmch" sortable="true" width="80"  data-options="headalign:'center',align:'center'" rowspan="2">板 块</th>

                <th field="zhbmch" sortable="true" width="150"  data-options="headalign:'center'" rowspan="2">指标名称</th>

                <th field="dw" sortable="true" width="80"  data-options="headalign:'center'" rowspan="2">指标单位</th>

                <th field="shn_ljzh" sortable="true" width="80" data-options="headalign:'center',editor:{type:'numberbox',options:{precision:3}}" rowspan="2">上一年度<br />同期累计<br />完成值</th>

                <th field="bn_jh" sortable="true" width="80" data-options="headalign:'center'" rowspan="2">已下达年<br />计划</th>

                <th colspan="4">指标完成情况</th>

                <th field="mxmch" sortable="true" width="250" data-options="headalign:'center'" rowspan="2">基础数据</th>

                <th field="mxzh" sortable="true" width="80" data-options="headalign:'center',editor:{type:'numberbox',options:{precision:3}}" rowspan="2">基础数据<br />(本期)</th>

                <th field="beizhu" sortable="true" width="350"  data-options="headalign:'center'" rowspan="2">备 注</th>

            </tr>

            <tr>

                <th field="bq_zh" sortable="true" width="90"  data-options="headalign:'center'">本期完成值</th>

                <th field="bn_ljzh" sortable="true" width="90"  data-options="headalign:'center'">累计完成值</th>

                <th field="bn_ljtb" sortable="true" width="80"  data-options="headalign:'center'">同 比</th>

                <th field="bn_tb" sortable="true" width="80"  data-options="headalign:'center'">与计划比</th>

            </tr>

        </thead>

    </table>

 //呈现列表数据

        $('#List').datagrid({ pagination: true,

            onLoadSuccess: function (data) {

                if (data.rows.length > 0) {

                    //调用mergeCellsByField()合并单元格

                    mergeCellsByField("tbList", "No");

                }

            }

        });