I was using facebook and found the following features appended into their left vertical menu.
- pages load so fast
- pages do have its back button enabled
- only a part of page reloads.
Can anyone put some idea into “How to implement it???”
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Finally i found out the solution. They use caching technology extensively with jQuery history plugin which enables history hence making it search engine friendly.
Can be found here
http://itswadesh.wordpress.com/2012/03/29/facebook-type-vertical-navigation-menu-created-with-jquery/