Disabling the Browser Back Button

Question:
Is there a method that will prevent a user from going back to the previous page without modifying the browser code? (Does it matter if it is a CGI generated page?). Of course it would nice if this worked on both IE 4.x and Netscape 4.x.

Answer:
Unfortunately you can’t prevent users from using their “Back” buttons. Similarly, you can’t prevent them from bookmarking a previous page and then jumping to it directly. If you have a multi-step process and you don’t want people to go back to a previous step once they’ve completed it then a cookie-based solution may do the trick. When they start the process set a cookie on the user’s browser (using document.cookie) to a value of 1. Each time they advance a step in the process set this cookie-based counter to the step number they’re on. At the beginning of every page in the process check the value of the counter to make sure that it isn’t higher than the number of the step associated with that page. If it is higher redirect them to the step they should be on. If the cookie is missing, redirect the user to the start of the process.

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