Whats the differences between the regular editions?
Historically, we’ve added a significant amount of new material in every new edition. The 2nd Edition was 195 pages, the 3rd Edition was 304 pages, the 4th Edition was 430 pages, and the 5th Edition was 498 pages. The 6th edition is also 498 pages but it actually contains much more than the 5th. That’s because we rewrote the book to conform to current best practices, which let us cut out much of the old browser-dependent code. That is, by cutting out separate tasks on how to do something in Netscape 4 or Netscape 6+ or IE, we could instead add full coverage of Ajax (two full chapters of coverage, in fact: Introducing Ajax and Ajax Toolkits). [Wondering what we did in previous editions? The 4th Edition added Chapter 7, Forms and Regular Expressions; Chapter 13, User Interface Design with JavaScript; Chapter 14, Applied JavaScript; and Chapter 15, Bookmarklets. In the 5th Edition, we reorganized some chapters, added a new chapter, Manipulating Nodes, and added new tasks to many different
