Quickly get data from AJAX

Example : 

1. Create "Ajax Callback" , name: get_emp

apex_util.json_from_sql('with e as 
                        (
                        select empno,ename,job,mgr,hiredate,sal from emp
                        )
                        select emp.* , mgr.ename mgr_name from e emp , e mgr
                        where emp.mgr = mgr.empno(+)
                        and emp.empno = :P135_EMPNO
                        ');

2. Create "Dynamic Action" in LOV 

    Action : Execute Javascript Code

apex.server.process
  ("get_emp"
  ,{ 
    pageItems : '#P135_EMPNO'
   }
  ,{ 
    success:function(pData)
    {
        $s('P135_JOB', pData.row[0].JOB);
        $s('P135_MGR', pData.row[0].MGR_NAME);       
        $s('P135_HIREDATE',new Date(pData.row[0].HIREDATE).toLocaleDateString());
        $s('P135_SAL', pData.row[0].SAL);
       
     }
} );