SQL & PL/SQL

Dear all,

here i have a small problem but it creating lots of problems.
example i have a query like

select add_months('27-FEB-2007',3) from dual;

it displaying after 3 months the same date like 5/27/2007 is good

but if i enter this
select add_months('28-FEB-2007',3) from dual;

it was displaying like 5/31/2007.

it giving the last day of the month but not the same date after 3 months.

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i have written in form to fire the data after 3 months which is having the same date .
if i enter any date except the last day month, its working fine.

but i want the same thing even if i enter the last day of month that has to display the same date.

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Thanks in advance,

Regards,

Venkat.