jqgrid--take a property of a multi-line object

          var arr = []
          var rowIds = jQuery(grid_selector).jqGrid('getGridParam', 'selarrrow');
          $(rowIds).each(function(i,rowId){
              roleDataNameId.push($(grid_selector).jqGrid('getRowData',rowId))

          for(var i=0;i<roleDataNameId.length;i++){

           arr.push(roleDataNameId[i].testId)

          }