application loses fragment after login

Hi all,
I am using uri fragment for my application history. My application link can be eg: http://myserver.com/app/#3400 to display the required object with the specified id 3400.
However, when putting FORM authentication to the application, after login the application lost the fragment (remain: http://myserver.com/app) hence it cannot display the needed information.
Anyone have the solution for this pls?

This problem is because of the HTTP SPECs. URI-fragment is NOT part of a request, thus it will be lost upon redirect (e.g. Login Form…). Some Browsers ignore this (Firefox, Chrome, Safari), some (IE) not.

Solution I’ve found always is using parameters instead of fragments…