[Forums] Change Required Field Message

Hello All,

Can we change required field message to custmize message.
eg
I have two rows as following

Name.
Mob No.

I have declared both fields mandatory on button click I have set validation client&server when both text boxes blank currently it shows requiredfield for both.
I want custmize message for both like Please Enter Name and Please Enter Mobile No.
also I want to check valid mobile no. on client side is there any inbuilt function available or I need to write any javascript for it.