jqGrid--设置单元格字体颜色

colModel: [
                {
                    name: '列名称',
                    index: '列名称',
                    width: 65,
                    sortable: true,
                    resizable: false,
                    cellattr: addCellAttr
                }]

function addCellAttr(rowId, val, rawObject, cm, rdata) {
 if (条件) {
               return "style='color:red'";
      }
}