01_576593 ffirs.qxd 10/12/04 9:55 PM Page iii ™ JavaScript FOR ‰ DUMmIES 4TH EDITION by Emily Vander Veer 01_576593 ffirs.qxd 10/12/04 9:55 PM Page ii 01_576593 ffirs.qxd 10/12/04 9:55 PM Page i ™ JavaScript FOR ‰ DUMmIES 4TH EDITION 01_576593 ffirs.qxd 10/12/04 9:55 PM Page ii 01_576593 ffirs.qxd 10/12/04 9:55 PM Page iii ™ JavaScript FOR ‰ DUMmIES 4TH EDITION by Emily Vander Veer 01_576593 ffirs.qxd 10/12/04 9:55 PM Page iv  ® 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: 01_576593 ffirs.qxd 10/12/04 9:55 PM Page v 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 01_576593 ffirs.qxd 10/12/04 9:55 PM Page vi 01_576593 ffirs.qxd 10/12/04 9:55 PM Page vii 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.