For JavaScript support, Okular has some support for it. However, likely the message you are getting it is because of XFA forms. The producers adds a page that XFA-compliant readers omit.
AFAIK, only proprietary PDF readers can handle XFA (or some subset of it). In Linux you have FoxIt and Master PDF Editor. They have free versions (as in free beer). I do not know if Chrome or Firefox support it, that could be another alternative.