How do I disable the 'back' button and cause a pop up box to appear when its clicked?

[Ellyyra]

Can someone please tell me how to do this using Javascript:

When user clicks the 'Back' button at the top of a browser a pop up box comes up telling them "Don't be a cheat." When they click okay, cancle, close - whatever - they remain on the page they were before.

Thank you in advance.

[jkmyoung]

This is unsafe browser behaviour. You'd have to instead save state somewhere on your server to make a page load up differently than before.