function with tablename parameter

hello,

it is possible to write something similar???

create function get_count(varchar(32)) RETURNS int4 AS '
DECLARE
  tmp int4;
BEGIN
  SELECT COUNT(*) INTO tmp FROM $1;
  RETURN tmp;
END;' LANGUAGE 'plpgsql';


SELECT get_count('k_part');
SQL error:
ERROR:  parser: parse error at or near "$1" at character 24

thanx, miso