Web Development and Design Foundations with XHTML, 5th Edition

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A Brief Look at JavaScript

●Describe common uses of JavaScript in Web

pages

●Describe the purpose of the Document Object

Model and list some common events

●Create a simple JavaScript using the <script>

tag and the alert()method

●Describe the considerations for XHTML

conformance and JavaScript

●Use variables, operators and the, ifcontrol

structure

●Create a basic form validation script

If a popup window mysteriously appears while you are

surfing the Web, you’re experiencing the effects of JavaScript. JavaScript is a

scripting language and JavaScript commands can be included in an XHTML

file. Using JavaScript, you can incorporate techniques and effects that will

make your Web pages come alive! You can display an alert box containing an

important message for the user. You can display an image when a user moves

the mouse pointer over a link, and much more. You don’t have to be a pro-

grammer to be able to add a little sizzle to your Web pages. This chapter intro-

duces JavaScript and some of its capabilities, and provides some samples that

you can build on to create your own Web pages.

Chapter Objectives In this chapter, you will learn how to ...

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