Dynamically updating sections of webpage

[David Shi]

I want to dynamically update sections of webpage, something like a div or table or frame.
 
Where can I find best examples/demos for this?  Preferably with a generic loader.
 
I would also like to find a best book on this.  It needs to be concise, well explained and can be applied universally.
 
Is there a book or reference like "Accelerated DOM Scripting with Ajax, APIs and Libraries and Python"?
 
Can anyone point me towards the right direction.  Please -- no over loaded websites.
 
I like to read Newtonian style of text!
 
Sincerely,
 
David


      
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20090208/caa631bb/attachment.html>