1) action function ==> Action Function is used to call the

   Controller Method from the Javascript.

2) action Poller ==> Action Poller is used to repeatedly
 
   call the controller method based on a Time Interval.

3) action status ==> Action Status is used to display

   the status of an Ajax Request.

4) action region ==> Action region is used to send only
 
   a part of the page to the server for Processing.

5) action support ==> Action Support is used to give

   support to other Ajax Components allowing the Component

   to be refreshed asynchronously by the server When a

   Particular event occurs.