Not sure if this is a bug so I won’t double post. Take a look at this thread http://www.scriptcase.net/forum/showthread.php?4263-Modal-target-for-form-button-links-not-working!
I think SC team must tell us if is possible do it. I posted some time back and do not response yet.
Hello,
Issue reported to our bugs team.
regards,
Bernhard Bernsmann