Wiki Wednesday (DOM) - February 22, 2012

Here are today's Wiki Wednesday articles! If you know about these
topics, please try to find a few minutes to look over these articles
that are marked as needing technical intervention and see if you can
fix them up. You can do so either by logging into the wiki and editing
the articles directly, or by emailing your notes, sample code, or
feedback to mdnwiki <at> mozilla.org.

Contributors to Wiki Wednesday will get recognition in the next Wiki
Wednesday announcement. Thanks in advance for your help!

Thanks to Matt N. for his contribution!

1) About the Document Object Model ( http://mzl.la/oBFLmH )
2) Using the Page Visibility API ( http://mzl.la/owBVXU )
3) Printing ( http://mzl.la/jgX9dR )