How To Hide the .nsf from Addresss Bar

Hi All, I am developing a system. where my user want to hide the (.nsf) from the address bar.

Like :- http://192.168.8.13/leave.nsf

He wants:-http://192.168.8.13/leave

Is it possible if yes then where i will set it in the server?

Please guide me?

How I will do that please guide me.