How to auto Populate  emailaddress field  to the subpanel of that module.

Hello All,

            I am using sugarcrm community-edition 6.5. I have a two  modules Accounts and contacts.Contacts module is the sub panel of Accounts module. In Accounts module there is an email address field .My requirement is to populate that email address(primary address ,opted-out) to the Contacts module email address field while creating a record of Contacts  through sub panel.

Could u please help me??