JavaScript book question
<p>Hey everyone I just purchased the book JavaScript demystified to read and learn JavaScript   but I just noticed that it was published in 2005 and it references netscape browsers and other "pratices" I believe are out dated like using the language attribute in the script tag and also not ending each line with a semicolon</p>

<p>My main question is has javascript changed so much since this book was published that reading this book not teach me what I need to know or could it still be a good reference?</p>
