js/semantics contains experimental code used to generate LR(1) and LALR(1) grammars for JavaScript as well as compile and check formal semantics for JavaScript. The semantics can be executed directly or printed into either HTML or Microsoft Word RTF formats. This code is written in standard Common Lisp. It's been used under Macintosh Common Lisp 4.0, and Allegro Common Lisp 5.0.1 for Windows, but should also work under other Common Lisp implementations. Contact Waldemar Horwat (waldemar@netscape.com or waldemar@acm.org) for more information.