- Inheritance and the prototype chain
- Explanation of the widely misunderstood and under-estimated prototype-based inheritance
- Internet Explorer Standards Support Documents
- [MS-ES3]: Internet Explorer ECMA-262 ECMAScript Language Specification Standards Support Document
- [MS-ES3EX]: Microsoft JScript Extensions to the ECMAScript Language Specification Third Edition
- [MS-ES5]: Internet Explorer ECMA-262 ECMAScript Language Specification (Fifth Edition) Standards Support Document
- [MS-ES5EX]: Internet Explorer Extensions to the ECMA-262 ECMAScript Language Specification (Fifth Edition)
Tools & advanced resources
- Firefox developer tools - The excellent built-in tools in Firefox.
- Code School - Learn by Doing, Multiple JS courses
- JSLint - syntax checker, warns against bad practices
- JSDoc - generate documentation from code
- Pretty Diff - a diff tool for comparing minified code to regular code
- Extension Developer's Extension - Offers JS Environment and Shell
- A Github-based wiki that indexes libraries and resources.
- Stack Overflow
- A collaboratively built and maintained Q&A site and look if you can find the answer to your question. If not you will be able to ask your question there.