Show more fields when selecting checkbox

I made this form with your script, but is there a way to ad more fields when checking a checkbox or hitting a button?
Now 2 people can signup, but I would like to make it an option to sign up 3 people.

www.jcsl.nl/scouting/aanmelden

Hi jscoolen,

at the moment this is not possible out of the box.
But actually I'm working on a new release of Visforms for Joomla! 3.x which will have lot's of new features, one of which are conditional fields, which would allow you to do exactly what you want. I think 90% of the code changes are already implemented but I it will still take me one or two (or maybe more) weeks (most of extensive testing and bugfixing) before I can release a beta.

I'll let you know (here in the forum), when the beta version of Visform 3.2.0 will be released and I would be glad, if you would help with testing then.

Kind Regards,
Aicha