Using Function returning setof record in JOIN

Hi

Is it possible to do a JOIN between a VIEW and the output of a FUNCTION?
e.g.
I have a function returning a SETOF records (using OUT parameters) with the following output:

testdb=# SELECT * FROM myfunc( 'AAA1' ); -- returns calculcated values for all orders for account 'AAA1'

_acc | _order | _date | _calc_amount
--------+------------+-------------+----------
AAA1 | ORDER_1 | 2010-12-13 | 1000.00
AAA1 | ORDER_2 | 2010-12-13 | 80.00
AAA1 | ORDER_5 | 2010-12-13 | 10.00
(the example is oversimplified - _calc_amount is one of many calculated values returned by the funtion)

I also have a VIEW returning the following:

testdb=# SELECT _accno, _client, _deladdress, _orderno FROM orders;

_accno | _client | _deladdress | _orderno | ....more order related data
--------+------------+---------------+------------+---------------------------------------------
AAA1 | JOHN | SMITH STR | ORDER_1 |
AAA1 | JOHN | MAIN STR | ORDER_2 |
AAA1 | JOHN | PARK RD | ORDER_5 |
CCC1 | CHARLIE | 2ND STR | ORDER_3 |
BBB1 | BENN | 5TH AVE | ORDER_4 |

I want to do a JOIN resulting in:

_acc | _order | _date | _amount | _client | _deladdress |....more order related data
--------+------------+-------------+-----------+------------+---------------+------------------------------
AAA1 | ORDER_1 | 2010-12-13 | 1000.00 | JOHN | SMITH STR |
AAA1 | ORDER_2 | 2010-12-13 | 80.00 | JOHN | MAIN STR |
AAA1 | ORDER_5 | 2010-12-13 | 10.00 | JOHN | PARK RD |

Hope this is possible.

Thanks in advance.