Chapter 4. Understanding JavaScript

WHAT YOU’LL LEARN IN THIS CHAPTER:

• What web scripting is and what it’s good for

• How scripting and programming are different (and similar)

• What JavaScript is and where it came from

• How to include JavaScript commands in a web page

• What JavaScript can do for your web pages

• Beginning and ending scripts

• Formatting JavaScript statements

• How a script can display a result

• Including a script within a web document

• Testing a script in your browser

• Modifying a script

• Dealing with errors in scripts

• Moving scripts into separate files

The World Wide Web (WWW) began as a text-only medium—the first browsers didn’t even support images within web pages. The Web has come a long way since those early ...

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