Jquery中Grid表格合并

合并后效果如图：

$("#listFareInformation").jqGrid('destroyGroupHeader').jqGrid('setGroupHeaders', {
   useColSpanStyle: true,
   groupHeaders:
   [
       { startColumnName: 'Validity_min', numberOfColumns: 2, titleText: 'Validity' }
   ]
});
//#listFareInformation为div的ID；Validity_min为colModel中name: 'Validity_min'；Validity为合并列名称