Help !!!

Dear All

I have a store procedure at SQL server 2000 such :


CREATE PROCEDURE CheckRecord @Record as varchar(35),@Table as varchar(20) output
with recompile

AS

declare @Rec as float

select @Table = ''
select @Rec = count(*) from Table1 where Number = @Record
if @Rec > 0
begin
select @Table = 'Table1'
end

select @Table = ''
select @Rec = count(*) from Table2 where Number = @Record
if @Rec > 0
begin
select @Table = 'Table2'
end

select @Table = ''
select @Rec = count(*) from Table3 where Number = @Record
if @Rec > 0
begin
select @Table = 'Table3'
end


My Question is how to stop store procedure if rec has found in table2 ?

Please help ...

Thx a lot,
Regards,
Long