You are looking at a very old, but free version of the course. If you are interesed the most recent version, check it out on the Perl Maven site.

12.15. Test page with JavaScript

- No single JavaScript engine, certainly there won't be those used in versions
  of IE
- There are several Open Source implementations
- Test only the data as it was sent
- Use a real browser (e.g. driven by Win32::IE::Mechanize)


If you are interested in on-site trainings by the author, please contact me directly.