The best way to learn about ForX is to look at the examples and play with them a little, so we have compiled some pages for you. The first example is only a basic one to show simple validation, the next three show the usage of groups and requirements in various manners. See the files for some more explanation.
The template file contains all elements which are required for a form to be handled by the ForX engine. Just fill the templates with your own content, adjust the path to the forx.js source file, and you're ready to go.