Java Server Faces Question:

AJAX and JSF together makes a rich web application. AJAX usage is focused on creating richer user interfaces. The UI components in JSF and MyFaces were originally developed using HTML. AJAX-enabled components can easily be added to JSF-based User Interfaces, as JSF supports the output formats at multiple levels. The support for AJAX for the implementation of UI logic that is to run on the client and also on the server; is provided by JSF 2.0 specification. When the Java Script in the browser is disabled, JSF 2.0 provides the support for degradation.