Beginning JavaScript with DOM Scripting and Ajax, 2nd Edition

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Contents About the Authors xv About the Technical Reviewer xvii Acknowledgments xix Introduction xxi ■■Chapter 1: Getting Started with JavaScript1 The Why of JavaScript2 What Is JavaScript?3 Problems and Merits of JavaScript3 JavaScript in a Web Page and Essential Syntax5 JavaScript Syntax 6 Code Execution 7 An Aside About Functions 8 Objects9 Simple JavaScript Example10 Summary12 ■■Chapter 2: Data and Decisions13 Data, Data Types, and Data Operators13 The String Data Type 14 Operators 16 JavaScript Variables 18 Converting Different Types of Data 20 www.it-ebooks.info vii
■ Contents The Composite Data Types: Array and Object23 Objects JavaScript Supplies You with: String, Date, and Math 24 Arrays31 The Array Object’s Methods and Properties 33 Making Decisions in JavaScript36 The Logical and Comparison Operators 37 Conditional Statements 39 Testing Multiple Values: The switch Statement 42 Repeating Things: Loops 44 Summary48 ■■Chapter 3: From DHTML to DOM Scripting49 JavaScript as the Behavior Layer50 Object Detection vs. Browser Dependence 52 Progressive Enhancement 54 JavaScript and Accessibility55 Good Coding Practices56 Naming Conventions 56 Code Layout 58 Commenting 60 Functions 61 Short Code via the Ternary Operator 63 Sorting and Reuse of Functions 64 Variable and Function Scope 65 Keeping Scripts Safe with the Object Literal 65 Summary67 ■■Chapter 4: HTML and JavaScript69 The Anatomy of an HTML Document69 Providing Feedback in Web Pages via JavaScript: The Old-School Ways73 Using window Methods: prompt( ), alert( ), and confirm( ) 73 Quick Review 78 viii www.it-ebooks.info
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Contents at a Glance About the Auth
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Chapter 1 Getting Started with Java
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Chapter 1 ■ Getting Started with
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Chapter 2 Data and Decisions Data a
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Chapter 2 ■ Data and Decisions
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The Date Object Chapter 2 ■ Data
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Generating a Random Number Chapter
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Chapter 3 From DHTML to DOM Scripti
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Chapter 3 ■ From DHTML to DOM Scr
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Variable and Function Scope Chapter
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Chapter 4 HTML and JavaScript In th
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Changing Attributes of Elements Cha
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Chapter 4 ■ HTML and JavaScript 4
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Shortening Your Scripts via InnerHT
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DOMhelp: Your Own Helper Library Ch
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Chapter 5 Presentation and Behavior
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Chapter 5 ■ Presentation and Beha
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Chapter 6 Common Uses of JavaScript
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Chapter 6 ■ Common Uses of JavaSc
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Rollover Effects on Parent Elements
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Embedded Slide Shows Chapter 6 ■
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User Feedback Methods The user feed
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Chapter 8 Back-End Interaction with
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Chapter 8 ■ Back-End Interaction
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Replacing XML with JSON Chapter 8
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Summary Chapter 8 ■ Back-End Inte
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Chapter 9 ■ Data Validation Techn
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Chapter 10 Modern JavaScript Case S
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Chapter 10 ■ Modern JavaScript Ca
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Page 343 and 344: APPENDIX A ■ Debugging JavaScript
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Page 375 and 376: About the Authors Russ Ferguson is
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