Thank you for reply ..i already hide two fields but validation are still fired...
Question clarification
1)simply i have 4 fields:(Title,Message,Email,Mobile)
2)all fields are required
3)validation are there in all fields(*required)
4)authorized user can only see two field (Title,Message) other fields (Email,Mobile) is not visible to authorized User
5)public user can see all the fields
Work done:
1)authorized user can see only 2 fields( other 2 fields are hidden)
2)public user can see all fields
Problem:
1)when authorized user click on submit button after enter data in two fields (title .message) get error email and mobile is required though it is not visible fields are hidden and still validation are fired
2)public user can do operation properly