Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com by Emily Vander Veer JavaScript ™ FOR DUMmIES ‰ 4TH EDITION 01_576593 ffirs.qxd 10/12/04 9:55 PM Page iii Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com 01_576593 ffirs.qxd 10/12/04 9:55 PM Page ii Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com JavaScript ™ FOR DUMmIES ‰ 4TH EDITION 01_576593 ffirs.qxd 10/12/04 9:55 PM Page i Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com 01_576593 ffirs.qxd 10/12/04 9:55 PM Page ii Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com by Emily Vander Veer JavaScript ™ FOR DUMmIES ‰ 4TH EDITION 01_576593 ffirs.qxd 10/12/04 9:55 PM Page iii Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com JavaScript ™ For Dummies, ® 4th Edition Published by Wiley Publishing, Inc. 111 River Street Hoboken, NJ 07030-5774 Copyright © 2005 by Wiley Publishing, Inc., Indianapolis, Indiana Published by Wiley Publishing, Inc., Indianapolis, Indiana Published simultaneously in Canada No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning or otherwise, except as permitted under Sections 107 or 108 of the 1976 United States Copyright Act, without either the prior written permis- sion of the Publisher, or authorization through payment of the appropriate per-copy fee to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, (978) 750-8400, fax (978) 646-8600. Requests to the Publisher for permission should be addressed to the Legal Department, Wiley Publishing, Inc., 10475 Crosspoint Blvd., Indianapolis, IN 46256, (317) 572-3447, fax (317) 572-4355, e-mail: brandreview@ wiley.com. Trademarks: Wiley, the Wiley Publishing logo, For Dummies, the Dummies Man logo, A Reference for the Rest of Us!, The Dummies Way, Dummies Daily, The Fun and Easy Way, Dummies.com, and related trade dress are trademarks or registered trademarks of John Wiley & Sons, Inc. and/or its affiliates in the United States and other countries, and may not be used without written permission. JavaScript is a trademark of Sun Microsystems, Inc. All other trademarks are the property of their respective owners. Wiley Publishing, Inc., is not associated with any product or vendor mentioned in this book. 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Library of Congress Control Number: 2004107963 ISBN: 0-7645-7659-3 Manufactured in the United States of America 10 9 8 7 6 5 4 3 2 1 4B/QS/RR/QU/IN 01_576593 ffirs.qxd 10/12/04 9:55 PM Page iv Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com About the Author Freelance author and Web guru Emily A. Vander Veer has penned several books and countless articles on Internet-related technologies and trends. You can e-mail her at eav@outtech.com. 01_576593 ffirs.qxd 10/12/04 9:55 PM Page v Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com 01_576593 ffirs.qxd 10/12/04 9:55 PM Page vi Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com Dedication For the D. Author’s Acknowledgments Many thanks to Gareth Hancock for giving me the opportunity to write the very first edition of this book; to Craig Lukasik, who reviewed this book for technical accuracy; and to all of the other tireless professionals at Wiley, without whom this book wouldn’t have been possible. 01_576593 ffirs.qxd 10/12/04 9:55 PM Page vii Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com [...]... interact with using JavaScript include windows, text fields, images, and embedded Java applets Table 1-1 Creating and Working with Objects Object HTML Tag JavaScript Web page document Image document.myImage HTML form document.myForm Button document.myForm myButton To add JavaScript to a Web... than ever before Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com Part I: Building Killer Web Pages for Fun and Profit 10 Figure 1-1: JavaScript lets you add interactive features to your Web site quickly and easily Along with this increased power comes increased complexity, unfortunately — but that’s where this new, improved, better-tasting edition of JavaScript For Dummies comes... subject A good one to try is HTML 4 For Dummies, 4th Edition, by Ed Tittel and Natanya Pitts (Wiley Publishing, Inc.) It’s easy! (Sort of) JavaScript has a reputation of being easy to use because ߜ The bulk of the document object model (the portion of the language that defines what kind of components, or objects, you can manipulate in JavaScript) is pretty straightforward ߜ For example, if you want to trigger... using JavaScript and the book you’re reading right now you can create all these effects and many more! The Web page in Figure 1-1 shows you an example of the kinds of things that you can look forward to creating for your own site A lot has changed since the previous edition of JavaScript For Dummies came out Perhaps the biggest change is the evolution of DHTML, or dynamic HTML DHTML refers to JavaScript. .. LANGUAGE= JavaScript > // JavaScript statements go here function processOrder() { // More JavaScript statements go here } ߜ You can use the and tags to include a separate, external JavaScript file (a file containing only JavaScript. .. about JavaScript (But Were Afraid to Ask!) In This Chapter ᮣ Understanding a working definition of JavaScript ᮣ Dispelling common JavaScript misconceptions ᮣ Getting started with JavaScript tools ᮣ Finding information online M aybe you’ve surfed to a Web site that incorporates really cool features, such as ߜ Images that change when you move your mouse over them ߜ Slideshow animations ߜ Input forms... Highlights: JavaScript Basics 9 What Is JavaScript? (Hint: It’s Not the Same Thing as Java!) 10 It’s easy! (Sort of) 11 It’s speedy! 13 Everybody’s doing it! (Okay, almost everybody!) 13 JavaScript and HTML 14 JavaScript and Your Web Browser .16 What Can I Do with JavaScript That I Can’t Do with Web Languages? 17 Make your Web site easy for folks... 215 Capturing User Input by Using HTML Form Fields 215 Creating an input-validation script 216 Calling a validation script 221 Putting It All Together: The Order Form Validation Script .222 Testing for existence 224 Testing for a numeric value .225 Testing for patterns 227 Form-level validation 228 Chapter 13: Handling User-Initiated... This CD 335 System Requirements 336 Using the CD 336 JavaScript For Dummies Chapter Files 337 What You’ll Find 337 If You Have Problems (Of the CD Kind) 338 Index 341 xvii Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com JavaScript For Dummies, 4th Edition xviii Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com... http://www.simpopdf.com Part I: Building Killer Web Pages for Fun and Profit 12 was the one that came up with JavaScript in the first place! Internet Explorer, on the other hand, supports JavaScript indirectly by providing support for JScript, its very own JavaScript- compatible language And despite claims by both Netscape and Microsoft that JavaScript and JScript, respectively, are “open, standardized . Wiley, the Wiley Publishing logo, For Dummies, the Dummies Man logo, A Reference for the Rest of Us!, The Dummies Way, Dummies Daily, The Fun and Easy Way, Dummies. com, and related trade dress. Vander Veer JavaScript ™ FOR DUMmIES ‰ 4TH EDITION 01_576593 ffirs.qxd 10/12/04 9:55 PM Page iii Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com JavaScript ™ For Dummies, ® 4th. script 221 Putting It All Together: The Order Form Validation Script 222 Testing for existence 224 Testing for a numeric value 225 Testing for patterns 227 Form-level validation 228 Chapter 13: Handling