question about PL/pgSQL function

With postgres 7.1
1. Function like example found on 24.4 Example in Programmer Guide   CREATE FUNCTION xxx (EMP, integer) RETURNS boolean
AS'......  (which EMP is a table )   How do I pass a record to this function in PL/PGSQL? I try this
 
....   select into rec1 * from EMP where empNo =''xxxx'';   i1 :=  xxx(rec1,5);
....   But it won't work!
2. Is that possible to return a record from a function? And how do I get the
returned record in PL/pgSql

JACK