public static function addOlsubjects($obj_Olsubjects)
 {
     $db = config::dbconfig();
     $obj_retresult = new returnResult();
     $obj_Olsubjects->SubjectId = DAL_manageOlsubjects::getLastOlsubjectsId() + 1;
     $sql = "INSERT INTO tbl_olsubjects (SubjectId,SubjectName,SubjectNumber) \n\t\tVALUES (" . common::noSqlInject($obj_Olsubjects->SubjectId) . "," . "'" . common::noSqlInject($obj_Olsubjects->SubjectName) . "'" . "," . common::noSqlInject($obj_Olsubjects->SubjectNumber) . ");";
     $rs = mysql_query($sql);
     if (mysql_affected_rows() > 0) {
         $obj_retresult->type = 1;
         $obj_retresult->msg = "success";
         $obj_retresult->data = $obj_Olsubjects;
     } else {
         $obj_retresult->type = 0;
         $obj_retresult->msg = "failed";
     }
     return $obj_retresult;
 }