Many times when writing forms, it would be nice to be able to easily make fields visible or invisible based on certain conditions. Applicability allows you to easily make, without writing any Javascript yourself, forms whose elements depend on certain actions or conditions.

The documentation is currently available here:

http://dev.newmedio.com/applicabilitydocs/

Also see the Wiki BasicSummary page.

To install, just do:

script/plugin install http://applicability.googlecode.com/svn/trunk/applicability