2009
jsregex - Super Simple Regex Tester
Opera web standards curriculum: JavaScript in town! - By Opera's Developer Relations Team
The JavaScript articles you will read within do not come close to being a complete treatment of the topic; rather, they are intended to provide enough information to give readers a gentle ride towards getting comfortable enough with JavaScript to work with it in confidence, write simple scripts, debug code, and build a stable base from which to work towards more complicated techniques and specialisations.