Browser Back Button

[Escalada Sergio]

   Hello.
   I am using MyFaces 1.1.5, Tomahawk 1.1.6 in my WEB Aplication, and i 
have a requirement mandatory to disable the browser back button while 
the user is interacting with the aplication. The requirement is really 
serious and compromise the usability of the aplication, can anyone tell 
me if it is possible to do anything to avoid the use of the browser back 
button?, or at least to control the use of it trying to avoid the 
consecuences it carry.

   Thanks in advance, sorry for my english.