flex3 - How to get the current page no. in flex paper? -

There is no tag on the Flex paper. Tag on
Flex Paper.

Now questions .. .. how can I get a page number?
I want to add some events when the page changes.
And I also need some incidents on some pages So I need the current number of pages that the user sees in Flex papers.

API page from:

... getCurrPage (someone No arguments.): Get the currently viewed page ...