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Chapter 17. Understanding the Window Obj... > Revisiting the Window Object Hierarc...

Revisiting the Window Object Hierarchy

With a few exceptions, the programming constructs you learned in Part 2, "Programming Fundamentals," and the objects you studied in Part 3, "Basic Objects" —Date, Math, String, and Navigator—are part of the language itself. That is, they aren't directly related to the Web page content or to the HTML tags that control the display of that content. But manipulating content and tags is what Web page building is all about, and it's central to what JavaScript was designed to do.

So it's high time you started learning how to use JavaScript to work with content and tags. The previous chapters in this book taught you all the fundamentals you need, so you're now ready to tackle some truly useful and interesting scripts.


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