Context menu on a web page

This is a link to an awsome tutorial .I always wanted to impliment that on a site guess now I can with this nice tutorial of how to change the context menu and ofcourse it uses the all mighty java script to get it done
http://www.openjs.com/scripts/ui/context_menu/

 This other link links you to the demonstration of the context menu at work on a web page
http://www.openjs.com/scripts/ui/context_menu/demo.php