Extra Website from Email Address Eloqua Form Field

Hello,

We created a landing page that will require (still working on the code) contacts to enter their work email address (no generic domains: gmail.com, outlook.com, etc.)

Because the contact must provide us with their work email address, we have access to their email address domain.

What's the best way to utilize the email address or email address domain to update the website field? I'm currently trying to use the contact washing machine with little luck.

Thanks in advance!

Derek