helenp - 11:01 am on Feb 28, 2013 (gmt 0)
What I am thinking,
if they hit the backbutton,
instead of displaying a message saying its been blocked for x minutes, please come back later.
I could store the id of the booking and if backbutton is hit then I could delete the booking, so they can go back and if they want to change any information in the bookingform.
As the id is autoincrease I will not have any problems if they go to another form.
Then is the question, when to expire session, or maybe better to kill it.