cross-site or cross-domain or cross-window browser ie firefox netscape plugin addon toolbar add-ons

I need a script that can be run from the webbrowser either using iframe , or whatever idea to prefill a form. I use to have the code and misplace it so i know its possible. All i need is for it to prefill a few text form. this should be done via, javascript , or php. to my understanding now a days you can't cause These kind of cross-site or cross-domain or cross-window (that would be the iframe-way) things have been eliminated in all current browsers due to security. we would need a plugin or addon for the browser so we can do this. like a toolbar. ## 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). ## Platform php, javascript vb, toolbar, ie