Kindly visit this link
http://flashden.net/item/flash-tab-contact-form/20539
herein if the user put any word in the phone number field it will not accept the same. I want to know how they make it and restricted the phone number field in such a way.
The form in question ( which I am going to make is here
please visit the contact page)
Waiting for some reply.
trnghosh