Ajax menu navigation like GlassFish admin?
I was looking at GlassFish 3.1 admin page, and wondering how GlassFish implements the Ajax menu navigation. It looks like each menu item has a JSF page associated, e.g. Domain -> serverInstDomainAttrs.jsf, Applications -> applications.jsf. Clicking the menu item will only refresh the content area without changing the header and etc.
Can you provide some guidelines and example of how to do this?