Back Button OFF : Best method ?

I have MS VS 2005 Asp.net 2.0 ajax
I have read these links :  
http://geekswithblogs.net/vivek/archive/2007/02/24/107148.aspx
http://csharpdotnetfreak.blogspot.com/2009/04/disable-browser-back-button-javascript.html
and
I like this comment, but have no idea how to code it up ...
FROM : Freakyuno
http://forums.asp.net/t/989339.aspx?PageIndex=2
.."
The previous comments aside...the method I usually prefer, is to use a combonation of session tracking, and a page ID, and I build a hash of the two.  I write a base page, that my "quiz" or "linear" process pages inherit from that tracks the session + hash and replaces the ...