Hope this is the correct forum.
I have used thickbox js library to display 'popup contact cards' on a private website. which requires the user to login, I chose this as it's far better than using real popup widows, or full windows do display the small amount of info (name, position, and phone number).
However the client has had trouble with some users clicking the browser back button to exit the 'thickbox' screen instead of the 'close' text in the thickbox header bar (or using the esc key as you can in the latest version of Thickbox), clicking the back button sometimes leads to the user being logged out returning them to the 'please login' page.

Does anyone know of any solution I can use to fix this?