Disable Browser Back Button

We need JavaScript code to disable browser Back button. We want user to go through a sequence of pages to register for services on our web site and we don't want users to go back to previous page and change something. The JavaScript code should be compatible with Internet Explorer 4.0 and later versions and Netscape 4.2 and later versions. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows? (depending on the nature? of the deliverables): a)? For web sites or? other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software? installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). The JavaScript code should be compatible with Internet Explorer 4.0 and later versions and Netscape 4.2 and later versions. ## Platform IE 4.0 and Netscape 4.2