cursors in plpgsql function??

Hi!

I have problem with declaring a cursor for a query in a plpgsql. I got 
compile error, and parse error at or near cursor.

Here my function for a trigger:
What can be the problem?

Thanks a lot
Attila

create function p_kotogep() returns opaque  as '          declare    ajanlid  ajanlati_konyv_p.ajanlat_id%TYPE;
userid  felhasznalo.user_id%TYPE;    megidop  timestamp;    termekid termek.termek_id%TYPE;    menny
portfolio.szabad_db%TYPE;   arr     portfolio.szabad_db%TYPE;    iran     ajanlati_konyv_p.irany%TYPE;    erv
timestamp;   hany    int4;    piar    bool;
 
    aktar   termek.arfolyam%TYPE;

begin work;    select count(ajanlat_id) into hany from 
ajanlati_konyv_p;

--     SOMEWHERE HERE I GET ALWAYS ERRORdeclare ajanlatok cursor for select * from 
ajanlati_konyv_p;
for i in 1..hany loop    fetch next from ajanlatok into        ajanlid, userid, megidop, termekid, 
menny, arr, piar, iran, erv;

    aktar= p_aktar(termekid);
if setup_olv(1) then        -- arjegyzovel 
jatszunk
  if iran = 1 then        -- vetel
    if aktar <= arr then
    insert into kotes_naplo_p (vevo_id, 
elado_id, termek_id, ar, mennyiseg, szabad_valt)     values (userid, 1, termekid, arr, menny, 
trktsg (menny, arr, 1) );
    delete from ajanlati_konyv_p where 
ajanlati_id = ajanlid;    else        end if;     else    if aktar >= arr then    insert into kotes_naplo_p (vevo_id, 
elado_id, termek_id, ar, mennyiseg, szabad_valt)     values (1, userid, termekid, arr, menny, 
trktsg (menny, arr, 1) );
    delete from ajanlati_konyv_p where 
ajanlati_id = ajanlid;
    else
    end if;  end if;

end if ;    -- arjegyzovel jatszunk vegeend loop;close ajanlatok;commit work;
return NULL;
; ' language 'plpgsql';
trigger paj_kot on ajanlati_konyv_p;
trigger paj_kot      after  insert  on ajanlati_konyv_p      for each row       execute procedure p_kotogep();



attika@elender.hu
http://www.bke.hu/~attika