dynamic parameters in procedure

Hi,

I want to create a stored procedure that can take a dynamic number of
in-parameters and base an inside-query based on those parameters.

My ideas was to use text[] as input parameters like this.

CREATE OR REPLACE FUNCTION get_table(text[])
RETURNS SETOF table AS
'
DECLARE
params ALIAS FOR $1;
query VARCHAR;
entry RECORD;
BEGIN
query := \'SELECT * FROM table\';

FOR entry IN EXECUTE query LOOP
RETURN NEXT entry;
END LOOP;
RETURN;
END;
'
LANGUAGE 'plpgsql';

My question is how do I loop the input-parameters?

I plan to call it like this:

SELECT * FROM get_table('{"field1=1", "field2=3"}');

Do I make any sense? :)

regards
Robin