About SP's and parameters

Hi all:

Is there a way to pass a tablename as a parameter to a SP?

I'll try to explain myself. I want to create a SP that can, for
instance, do a delete from ...... so that any particular application all

it has to do is call the SP sending the table to be deleted.

Right now I have:

CREATE FUNCTION deleteanytable (bpchar)
returns integer
as '
begin
delete from $1;

return 1;
end;'
language 'plpgsql';

If I call it:
select deleteanytable ( mytable );

I get a message saying

ERROR: Attribute 'mytable' not found

Thanks for your help.

P.S. It would be very interesting if a columnname could also be sent as
a parameter to the Stored Procedure.