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The Big DHTML Picture

The first thing you need to understand about DHTML is that you don't have to forget anything that you've learned so far. The JavaScript object model that I've stressed throughout this book still exists. You can still manipulate built-in JavaScript objects such as String and Math as well as the top-level Window object and its associated properties, methods, and events.

Where DHTML comes in is at the level of the Document object. DHTML is concerned solely with the documents that are displayed in the browser. With that in mind, there are three essential components to the DHTML experience:


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