Pop-Up in Zoho CRM for Specific Accounts & Contacts

Pop-Up in Zoho CRM for Specific Accounts & Contacts

I have been trying to get a simple pop-up to display a warning message when a specific account or contact is accessed.  I have tried validation rules, blueprint, etc...  Is there are a way to code this in Deluge or Zoho Creator? I am not sure if others users have wanted a similar implementation.