public static function isChildPerson_educationlevel($EducationLevelId, $ChildEducationLevelId)
 {
     $ischild = false;
     $obj_retResult = DAL_managePerson_educationlevel::getPerson_educationlevelListByEducationLevelId($ChildEducationLevelId);
     //get child node
     if ($obj_retResult->type == 1) {
         $arr_Person_educationlevelList = $obj_retResult->data;
         $obj_Person_educationlevel = $arr_Person_educationlevelList[0];
         $arrParentIds = explode(",", $obj_Person_educationlevel->Url);
         foreach ($arrParentIds as $Person_educationlevelParentId) {
             if ($Person_educationlevelParentId == $EducationLevelId) {
                 $ischild = true;
             }
         }
     }
     return $ischild;
 }