I'm reading a bunch of tutorials on javascript. Perhaps I will learn this later but I am impatient.

1) Does javascript have version numbers? Like my currently installed PHP is 5.2.8, and soon to be 5.3.0.

Is there something like that in javascript? If so, what is the current "version"?


2) Is JS the same thing as saying javascript? Or does JS mean something else?

3) Is DOM and javascript intertwined?


4) If anyone recommends any recently published books on javascript, I'll run out and buy it immediately.


That's about it for now!

Thanks!