SQL & PL/SQL :: DBMS Job Scheduler

How to pass parameter value to a procedure in schedule jobs ?

--procedure :
create or replace procedure updating_temptable(empcode in varchar2) is
begin
update ts_employee_master mas
set mas.last_accessed = sysdate
where mas.employee_code = empcode;
end;

--scheduler

begin
sys.dbms_job.submit(job => :job,
what => 'updating_temptable;',
next_date => to_date('24-04-2012 00:30:00', 'dd-mm-yyyy hh24:mi:ss'),
interval => 'TRUNC(SYSDATE)+1+30/1440');
commit;
end;
/

How to pass employee_code in the procedure[updating_temptable ] in dbms job scheduler ?