How to trace back and forward button event   

Does any one know how to trace back and forward and refresh button event.

I am making web based app. I wanted to restrict user doing 
(Back-Forward-Refresh) opration on my Web App.

Is there any way I can disable or else I can trace the event?


Thanks in advance,
Ritu

date: Tue, 9 Oct 2007 00:11:03 -0700   author:   ritu