I discovered today that Facebook not only uses JQuery, but also uses JQuery plugins.
How did I find?
Well I just used a Web Developer research tool called Firebug. It has been around for several years now, and is essential for every good web developer, and web professional.
For example, it uses the below plugin:
This plugin can treat normal link tags like an AJAX post.
This gives Facebook its unique loading interactions.
This same functionality and technology can be used on any site.
Interested? Let me know!