Simple Userdefined Function Question.

Hi All!

This is the first time i am tryin to write a sql server 2000 function.
I need to clean up some of my stored procedures..

Can any one please give me skeleton for a userdefined function or
correct my function. I get the following error.

Select statements included within a function cannot return data to a
client.



This returns a bit and it does a query to the database to decide the
value of the bit





CREATE FUNCTION GoodAd
(@adid int,@currentdate datetime)
RETURNS bit
AS
BEGIN
declare @Return bit
select @return = 1

if exists (select null from adqas where adid=@adid)
select @return 0


return @return
end