Variable number or arguments to a function possible?

Hello everybody,

Is it possible to create a function that can take a variable number of
arguments?
I would like to write a function that creates a new record in the
database. Based on what I send it, it should create a record in the
appropriate table.

Simple pseudo-code example:

... function create_record( varchar [,...] ) returns bigint as

if $1 = 'state' then insert into state ( $2, $3 ) // $2 being state
name, and $3 state code
if $1 = 'phone' then insert into phone ( $4::bigint, $2, $3 ) // $2 =
phone number, $3 = phone type, $4 = id of person that ownes the phone

and so on.

How would I declare that function?

Thanks.

best regards,
chris
--
chris ruprecht
database grunt and bit pusher extraordinaíre