Autopopulating fields with SharePoint data

[John K.]

Hello,

I have a form that has SharePoint Contacts data at the backend.

What I am trying to do is this:

When a name is selected from the DocOwner pull-down (the list is from the
SharePoint FullName list), I would like the DocOwnerEmail and DocOwnerPhone
pull downs to be automatically populated with that DocOwner's information. or
example:

I have John Smith, (e-mail address removed), 444-555-5555 listed as a contact in SP.

When I choose "John Smith" from the DocOwner pull-down, I want the
"(e-mail address removed)" and "444-555-5555" to be automatically populated in the
appropriate fields.

I am guessing I can do this as a rule, but with 20 users that may change
over time, I'd like to find a general way to populate the appropriate fields
by just choosing the name of the contact.

Any help would be greatly appreciated.

Thanks!