PERFORM statement

I was reading about Postgres stored procs in the FAQ:

https://wiki.postgresql.org/wiki/FAQ#Does_PostgreSQL_have_stored_procedures.3F

It claims that an alternative syntax to:

SELECT theNameOfTheFunction(arg1, arg2);

Is:

PERFORM theNameOfTheFunction(arg1, arg2);

However, when I try the following:

CREATE TABLE app_for_leave
(
sno integer NOT NULL,
eid integer,
ename varchar(20),
sd date,
ed date,
sid integer,
status boolean DEFAULT false,
CONSTRAINT pk_snoa PRIMARY KEY (sno)
);

CREATE FUNCTION MyInsert(_sno integer, _eid integer, _sd date, _ed date,
_sid integer, _status boolean)
RETURNS void AS
$BODY$
BEGIN
INSERT INTO app_for_leave(sno, eid, sd, ed, sid, status)
VALUES(_sno, _eid, _sd, _ed, _sid, _status);
END;
$BODY$
LANGUAGE 'plpgsql' VOLATILE
COST 100;

PERFORM MyInsert(1,101,'2013-04-04','2013-04-04',2,'f' );

I get the error:

ERROR: syntax error at or near "PERFORM"
SQL state: 42601
Character: 1

Is the FAQ out of date or was this feature removed? I'm using 9.2.1.
Thanks!

Mike