Hi Theo,
Thank you for using Essential PDF.
Yes. It is possible to achieve your requirements using PDFJavaScript actions. Please have a look at the sample in the link below which hides a button field while clicking on a radio button and displays the same while click on the other.
Sample:
http://www.syncfusion.com/uploads/redirect.aspx?&team=support&file=hideButton1654416784.zipPlease try this and let us know if you have any questions.
Regards,
Pravin.