I need the page rotation effect in my pdf files.I found the effect of page rotation in images, but did not understand how to do this in pdf files. please guide me
There are several ways to do this - both network and proprietary. We provide a GPL viewer that has some options for this and a non-GPL viewer that has animated page rotation effects. Here you can find the GPL viewer: http://flexpaper.devaldi.com/download/
A GPL-free viewer with desktop publisher for Mac and PC can be found here: http://flexpaper.devaldi.com/flexpaper_flip_zine.jsp
(note: I'm related to the solution above)