Observer Design Pattern Using JavaScript
http://www.codeproject.com/KB/scripting/Observer_Pattern_JS.aspx

Handy XP Style Menu
http://www.codeproject.com/KB/scripting/leftmenu.aspx

AJAX For Beginners
http://www.itechcollege.com/courses/AJAX/

http://www.codeproject.com/KB/scripting/jsbeginner.aspx

http://secure.codeproject.com/KB/scripting/cookies_intro.aspx

http://www.codeproject.com/KB/scripting/Javascript_PageCookie.aspx