new Ajax.Request(g_path+c_Kp_ScriptFileName, 

{
         parameters:  {
            '_func': 'UserDepartment',
            '_p_user_id': taskid
         }, 
      onSuccess: function(transport) {
            var l_res = transport.responseText.evalJSON();
            wnd_alert(l_res.kpparam);
               }   
      }
      )

function UserDepartmen($p_user_id) {
   $con = GetConnection();
   $sql = $con->prepare("select * from table where id=:userid");
   $sql->execute(array(":userid" => $p_user_id));
   $array = current($sql->fetchAll(PDO::FETCH_ASSOC));
   return $array;
echo json_encode($array);
   }

new Ajax.Request(g_path+c_Task_ScriptFileName, 
{
			parameters:  {
				'_func': 'getstatuskp',
				'tsk_id': _id.value
			}, 
		onSuccess: function(transport,taskdelaperspid) {
				var l_res = transport.responseText.evalJSON();
			//wnd_alert(l_res['kpstatus']);
			//newkpst=l_res;
		var newkpst=l_res['kpstatus'];
							}	
		}
		)

	$res2 = current($sql2->fetchAll(PDO::FETCH_ASSOC));
	$arr = array();
	$response = array('kpstatus'=> $res2['kpstatus']);
	return $response;