Learning Javascript from a Dated Book (2002)

The changes in javascript since 2002

[Jesseo]

Picked up a copy of 4th edition of O'reilly's "Javascript The definitive guide" which covers Javascript version 1.5.

what are the core updates the language has made since this time?

thanks

[Jeremy_H]

My understanding is v1.5 is this latest version.

[mozilla.org...]