disable back button?

[Dean Hiller]

so I spent hours debugging something that was not my apps bug.  
Basically I clicked a commandLink on my app.  I clicked IE back button 
and clicked a different commandLink button(this resulted in refreshing 
the page).  I then clicked the same commandLink and this time it went to 
the page it was supposed to go to.  How can I resolve this issue?  This 
obviously will be considered a bug by my users.

Is there a way to fix this problem? 
1. don't allow back button
2. get the commandlinks to work without having to refresh the page(I am 
using tree2)
thanks,
dean