[Jqgrid] 멀티헤더 설정

 // Multi Header
 jQuery("#list1").jqGrid('setGroupHeaders', {
   useColSpanStyle: false,
   groupHeaders:[
  {startColumnName: 'COL1', numberOfColumns: 3, titleText: '<em>헤더1</em>'},
  {startColumnName: 'COL4', numberOfColumns: 4, titleText: '<em>헤더2</em>'}
   ]
 });