Chapter 1. JavaScript Comes of Age

Mastering javascript is an essential skill for every Web designer. This wasn’t always true, but JavaScript has taken on a new and important role in modern Web sites. For any interface designer or for any Web engineer who works with the presentation layer, it is now as important to know JavaScript as it is to know HTML and CSS.

While HTML has traditionally enabled you to create a structured Web page, and CSS enabled you to give it a pleasing visual appearance, a page created in this way has little or no visual response to user action, except perhaps for some links that highlight when rolled over or a simple CSS-driven drop-down menu. If a user sends data to the server by clicking a link or submitting a form, ...

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