re-throwing exception does not work in suite scripts

Good mornign,
I'm trying to manage the unhandled exceptions in beforeLoad event function, in this way:

 page_BeforeLoad = function(p_sType, p_oForm)  {    try {      // some code      [...]    } catch(oExc) {      gestisciExc(oExc);      return false;    }  } 

and the gestisciExc function:

 gestisciExc = function(p_oExc) {    // some code    [...]      // rethrow exception    throw(p_oExc);  } 

But when an exception occurs, the script seems to go in timeout error and the exception is not re-thrown.

If I rewrite the event function code this way, NetSuite normally handles the error with a notice while trying to load the record.

 page_BeforeLoad = function(p_sType, p_oForm)  {    // some code    [...]  } 

Is there a particular way to re-throw an exception so that NetSuite can handle it normally as if I didn't catch it in a try-catch block?