.......
onLoadSuccess : function(data) {

        if (data.rows.length > 0) {

                    //调用mergeCellsByField()合并单元格

             mergeCellsByField("grid","supply_fullname,in_supply,in_no,in_sales");

                }

            }

/*
tableID:表格的ID
colList：需要合并的列，如果有多个，可以以,分开
*/

function mergeCellsByField(tableID, colList) {

    //alert(tableID+"  "+colList);

    var ColArray = colList.split(",");

    var tTable = $("#" + tableID);

    var TableRowCnts = tTable.datagrid("getRows").length;

    var tmpA;

    var tmpB;

    var PerTxt = "";

    var CurTxt = "";

    var alertStr = "";

    for (j = ColArray.length - 1; j >= 0; j--) {

        PerTxt = "";

        tmpA = 1;

        tmpB = 0;

        for (i = 0; i <= TableRowCnts; i++) {

            if (i == TableRowCnts) {

                CurTxt = "";

            }

            else {

                CurTxt = tTable.datagrid("getRows")[i][ColArray[j]];

            }

            if (PerTxt == CurTxt) {

                tmpA += 1;

            }

            else {

                tmpB += tmpA;

                tTable.datagrid("mergeCells", {

                    index: i - tmpA,

                    field: ColArray[j],　　//合并字段

                    rowspan: tmpA,

                    colspan: null

                });

                tTable.datagrid("mergeCells", { //根据ColArray[j]进行合并

                    index: i - tmpA,

                    field: "Ideparture",

                    rowspan: tmpA,

                    colspan: null

                });

                tmpA = 1;

            }

            PerTxt = CurTxt;

        }

    }

}