If I understand this correctly, in your form 11 you have a field called [EngGroup] that the users are selecting from.
What you can do is make a URL Formula button that redisplays the record with dfid=12. with this code:
URLRoot() & "db/" & [Your Table] & "?a=dr&dfid=12&rid=" & [Your Record ID#]
Put the button near the dropdown [EngGroup] on your form id 11. Then, use a dynamic form rule to hide the button, unless "Group D" is the chosen engineer group. Then the user can click that button and it will take them to the form.
This is probably 1 extra click from what you are used to, but it wouldn't be using Javascript to do so. I don't think there is a way to auto-trigger the URL button, the users would have to click it. But you can definitely hide or show it based on the fields on your form.
