Contents at a Glance Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix Part I: Getting Started with JavaScript . . . . . . . . . . . . . . . . . . . 1 Chapter 1: JavaScript’s Role in the World Wide Web and Beyond . . . . . . . . . . 3 Chapter 2: Authoring Challenges Amid the Browser Wars . . . . . . . . . . . . . . 11 Chapter 3: Your First JavaScript Script . . . . . . . . . . . . . . . . . . . . . . . . . 19 Part II: JavaScript Tutorial — Summary . . . . . . . . . . . . . . . . . . 29 Chapter 4: Browser and Document Objects . . . . . . . . . . . . . . . . . . . . CD-1 Chapter 5: Scripts and HTML Documents . . . . . . . . . . . . . . . . . . . . . CD-23 Chapter 6: Programming Fundamentals, Part I . . . . . . . . . . . . . . . . . . CD-35 Chapter 7: Programming Fundamentals, Part II . . . . . . . . . . . . . . . . . . CD-47 Chapter 8: Window and Document Objects . . . . . . . . . . . . . . . . . . . . CD-61 Chapter 9: Forms and Form Elements . . . . . . . . . . . . . . . . . . . . . . . CD-75 Chapter 10: Strings, Math, and Dates . . . . . . . . . . . . . . . . . . . . . . . . CD-89 Chapter 11: Scripting Frames and Multiple Windows . . . . . . . . . . . . . . CD-99 Chapter 12: Images and Dynamic HTML . . . . . . . . . . . . . . . . . . . . . CD-109 Part III: Document Objects Reference . . . . . . . . . . . . . . . . . . . 35 Chapter 13: JavaScript Essentials . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Chapter 14: Document Object Model Essentials . . . . . . . . . . . . . . . . . . . 61 Chapter 15: Generic HTML Element Objects . . . . . . . . . . . . . . . . . . . . . 105 Chapter 16: Window and Frame Objects . . . . . . . . . . . . . . . . . . . . . . . 217 Chapter 17: Location and History Objects . . . . . . . . . . . . . . . . . . . . . . 321 Chapter 18: The Document and Body Objects . . . . . . . . . . . . . . . . . . . . 339 Chapter 19: Body Text Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409 Chapter 20: HTML Directive Objects . . . . . . . . . . . . . . . . . . . . . . . . . 473 Chapter 21: Link and Anchor Objects . . . . . . . . . . . . . . . . . . . . . . . . . 493 Chapter 22: Image, Area, and Map Objects . . . . . . . . . . . . . . . . . . . . . . 505 Chapter 23: The Form and Related Objects . . . . . . . . . . . . . . . . . . . . . 527 Chapter 24: Button Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 549 Chapter 25: Text-Related Form Objects . . . . . . . . . . . . . . . . . . . . . . . . 569 Chapter 26: Select, Option, and FileUpload Objects . . . . . . . . . . . . . . . . 589 Chapter 27: Table and List Objects . . . . . . . . . . . . . . . . . . . . . . . . . . 613 Chapter 28: The Navigator and Other Environment Objects . . . . . . . . . . . . 665 Chapter 29: Event Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 711 Chapter 30: Style Sheet and Style Objects . . . . . . . . . . . . . . . . . . . . . . 777 Chapter 31: Positioned Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . 855 Chapter 32: Embedded Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . 901 Chapter 33: XML Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 919 Part IV: JavaScript Core Language Reference . . . . . . . . . . . . . . 925 Chapter 34: The String Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 927 Chapter 35: The Math, Number, and Boolean Objects . . . . . . . . . . . . . . . 951 Chapter 36: The Date Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 967 Chapter 37: The Array Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 987 Chapter 38: The Regular Expression and RegExp Objects . . . . . . . . . . . . 1007 Chapter 39: Control Structures and Exception Handling . . . . . . . . . . . . . 1033 Chapter 40: JavaScript Operators . . . . . . . . . . . . . . . . . . . . . . . . . . 1069 Chapter 41: Functions and Custom Objects . . . . . . . . . . . . . . . . . . . . 1093 Chapter 42: Global Functions and Statements . . . . . . . . . . . . . . . . . . . 1127 Part V: Putting JavaScript to Work . . . . . . . . . . . . . . . . . . . . 1147 Chapter 43: Data-Entry Validation . . . . . . . . . . . . . . . . . . . . . . . . . . 1149 Chapter 44: Scripting Java Applets and Plug-ins . . . . . . . . . . . . . . . . . . 1177 Chapter 45: Debugging Scripts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1217 Chapter 46: Security and Netscape Signed Scripts . . . . . . . . . . . . . . . . . 1239 Chapter 47: Cross-Browser Dynamic HTML Issues . . . . . . . . . . . . . . . . 1259 Chapter 48: Internet Explorer Behaviors . . . . . . . . . . . . . . . . . . . . . . 1273 Chapter 49: Application: Tables and Calendars . . . . . . . . . . . . . . . . . . 1285 Chapter 50: Application: A Lookup Table . . . . . . . . . . . . . . . . . . . . . . 1299 Chapter 51: Application: A “Poor Man’s” Order Form . . . . . . . . . . . . . . . 1311 Chapter 52: Application: Outline-Style Table of Contents . . . . . . . . . . . . . 1321 Chapter 53: Application: Calculations and Graphics . . . . . . . . . . . . . . . 1355 Chapter 54: Application: Intelligent “Updated” Flags . . . . . . . . . . . . . . . 1365 Chapter 55: Application: Decision Helper . . . . . . . . . . . . . . . . . . . . . . 1375 Chapter 56: Application: Cross-Browser DHTML Map Puzzle . . . . . . . . . . 1399 Chapter 57: Application: Transforming XML Data Islands . . . . . . . . . . . . 1415 Part VI: Appendixes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1431 Appendix A: JavaScript and Browser Object Quick Reference . . . . . . . . . . 1433 Appendix B: JavaScript Reserved Words . . . . . . . . . . . . . . . . . . . . . . 1447 Appendix C: Answers to Tutorial Exercises . . . . . . . . . . . . . . . . . . . . . 1449 Appendix D: JavaScript and DOM Internet Resources . . . . . . . . . . . . . . . 1465 Appendix E: What’s on the CD-ROM . . . . . . . . . . . . . . . . . . . . . . . . . 1469 Appendix F: Examples from Parts III and IV . . . . . . . . . . . . . . . . . . . CD-117 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1473 End User License Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1512 CD-ROM Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 1516 . CD-109 Part III: Document Objects Reference . . . . . . . . . . . . . . . . . . . 35 Chapter 13: JavaScript Essentials . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Chapter 14: Document. . . . . . . . . . . . . . . . CD-116 Part III: Document Objects Reference 35 Chapter 13: JavaScript Essentials . . . . . . . . . . . . . . . . . . . . . 37 JavaScript Versions . . . . . . . . . . . . . . . . . . . . CD-1 JavaScript in Action . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CD-2 xxiv JavaScript Bible, Gold Edition The Document Object Model . . . . .