Unobtrusive Javascript

Unobtrusive Javascript - An excellent refresher course for the changing times and browsers.

It starts with some basic advice:

1. Never, under any circumstances add Javascript directly to the document.

2. Javascript is an enhancement, not a secure functionality

3. Check the availability of an object before accessing it

4. Create Javascript, not browser specific dialects

5. Don't hijack other script's variables

6. Keep effects mouse independent

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