Variable number of arguments

Hi,

I'm wondering if there is any possibility of passing a variable number
of arguments to SQL or PLPGSQL functions.
I tried with arrays:

create function test(integer,varchar(20)[]) returns oid as '
declare
narg ALIAS FOR $1;
args ALIAS FOR $2;
begin
FOR i IN 0..nargs-1 LOOP
RAISE NOTICE ''args is %'', args[i];
^^^^ <--this is obviously wrong
END LOOP
END;
'
language 'plpgsql';

so the problem is accessing the values in an array.

If there is another approach to pass a variable number of arguments
please tell me.

Thanks

Robert ü