1. Chapter 1 Hello JavaScript!

   1. Hello World!

   2. Hello World! Once Again

   3. JavaScript Files

   4. Accessibility and JavaScript Best Practices

2. Chapter 2 JavaScript Data Types and Variables

   1. Identifying Variables

   2. Primitive Types

   3. The String Data Type

   4. The Boolean Data Type

   5. The Number Data Type

   6. The null and undefined Variables

   7. Constants: Named but Not Variables

   8. Test Your Knowledge: Quiz

   9. Test Your Knowledge: Answers

3. Chapter 3 Operators and Statements

   1. The Format of a JavaScript Statement

   2. The Assignment Statement

   3. Conditional Statements and Program Flow

   4. The Conditional Operators

   5. The Logical Operators

   6. Advanced Statements: The Loops

   7. Test Your Knowledge: Quiz

   8. Test Your Knowledge: Answers

4. Chapter 4 The JavaScript Objects

   1. Primitive Data Types As Objects

   2. Boolean, Number, and String

   3. Regular Expressions and RegExp

   4. The Date Object

   5. The Math Object

   6. JavaScript Arrays

   7. Test Your Knowledge: Quiz

   8. Test Your Knowledge: Answers

5. Chapter 5 Functions

   1. Declarative Functions

   2. Anonymous Functions

   3. Function Literals

   4. Function Type Summary

   5. Function Scope

   6. Function As Object

   7. Test Your Knowledge: Quiz

   8. Test Your Knowledge: Answers

6. Chapter 6 Troubleshooting, Debugging, and Cross-Browser Issues

   1. Simple Ways to Debug

   2. Development and Debugging Tools by Browser

   3. Dealing with Cross-Browser Differences

   4. Test Your Knowledge: Quiz

   5. Test Your Knowledge: Answers

7. Chapter 7 Catching Events

   1. The Events

   2. Level 0 Event Handling

   3. The DOM Level 2 Event Model

   4. Test Your Knowledge: Quiz

   5. Test Your Knowledge: Answers

8. Chapter 8 Forms, Form Events, and Validation

   1. Attaching Events to Forms: Different Approaches

   2. Selection

   3. Radio Buttons and Checkboxes

   4. The text, textarea, password, and hidden Input Elements

   5. Input Fields and Regular Expression Validation

   6. Forms, the Sandbox, and XSS

   7. Test Your Knowledge: Quiz

   8. Test Your Knowledge: Answers

9. Chapter 9 Browser As Puzzle Box

   1. The Structure of the Browser at a Glance

   2. The window Object

   3. Creating and Controlling Windows

   4. Frames

   5. Adding and Controlling Timers

   6. The history, screen, and navigator Objects

   7. The Document Object

   8. innerHTML

   9. Test Your Knowledge: Quiz

   10. Test Your Knowledge: Answers

10. Chapter 10 Cookies and Other Client-Side Storage Techniques

    1. The JavaScript Sandbox and Cookie Security

    2. All About Cookies

    3. Flash Shared Objects, Google Gears, and HTML5 DOM Storage

    4. Test Your Knowledge: Quiz

    5. Test Your Knowledge: Answers

11. Chapter 11 The DOM, or Web Page As Tree

    1. A Tale of Two Interfaces

    2. The DOM HTML API

    3. Understanding the DOM: The Core API

    4. Element and Access in Context

    5. Modifying the Tree

    6. Test Your Knowledge: Quiz

    7. Test Your Knowledge: Answers

12. Chapter 12 Dynamic Pages

    1. JavaScript, CSS, and the DOM

    2. Fonts and Text

    3. Position and Movement

    4. Size and Clipping

    5. Display, Visibility, and Opacity

    6. Revisiting the DOM: Collapsing Forms, Query Selectors, and Class Names

    7. Test Your Knowledge: Quiz

    8. Test Your Knowledge: Answers

13. Chapter 13 Creating Custom JavaScript Objects

    1. The JavaScript Object and Prototyping

    2. Creating Your Own Custom JavaScript Objects

    3. Object Encapsulation

    4. Chaining Constructors and JavaScript Inheritance

    5. One-Off Objects

    6. Object Libraries: Packaging Your Objects for Reuse

    7. Advanced Error Handling Techniques (try, throw, catch)

    8. Test Your Knowledge: Quiz

    9. Test Your Knowledge: Answers

14. Chapter 14 Moving Outside the Page with Ajax

    1. How Ajax Works

    2. Hello Ajax World!

    3. The XMLHttpRequest Object and Preparing to Send the Request

    4. Processing the Web Request Return

    5. Ajax: It’s Not Only Code

    6. JavaScript and Ajax Libraries

    7. Test Your Knowledge: Quiz

    8. Test Your Knowledge: Answers

15. Chapter 15 Ajax Data: XML or JSON?

    1. XML-Formatted Ajax Results

    2. JavaScript Object Notation

    3. Test Your Knowledge: Quiz

    4. Test Your Knowledge: Answers

1. Colophon

The animal on the cover of Learning JavaScript, Second Edition, is a baby black, or hook-lipped, rhinoceros (Diceros bicornis). The black rhino is one of two African species of rhinos. Weighing up to one and a half tons, it is smaller than its counterpart-the white, or square-lipped, rhinoceros. Black rhinos live in savanna grasslands, open woodlands, and mountain forests in a few small areas of southwestern, south central, and eastern Africa. They prefer to live alone and will aggressively defend their territory.

With an upper lip that tapers to a hooklike point, the black rhino is perfectly suited to pluck leaves, twigs, and buds from trees and bushes. It is able to eat coarser vegetation than other herbivores.

Black rhinos are odd-toed ungulates, meaning they have three toes on each foot. They have thick, gray, hairless hides. Among the most distinctive of the rhino's features is its two horns, which are actually made of thickly matted hair rather than bone. The rhino uses its horns to defend itself against lions, tigers, and hyenas, or to claim a female mate. The courtship ritual is often violent, and the horns can inflict severe wounds.

After mating, the female and male rhinos have no further contact. The gestation period is 14 to 18 months, and the calves nurse for a year, though they are able to eat vegetation almost immediately after birth. The bond between a mother and her calf can last up to four years before the calf leaves its home.

In recent years, rhinos have been hunted to the point of near extinction. Scientists estimate that there may have been as many as a million black rhinos in Africa 100 years ago, a number that has dwindled to 2,400 today. All five remaining species, which include the Indian, Javan, and Sumatran rhinos, are now endangered. Humans are considered their biggest predators.

The cover image is from Cassell's Natural History. The cover font is Adobe ITC Garamond. The text font is Linotype Birka; the heading font is Adobe Myriad Condensed; and the code font is LucasFont's TheSansMonoCondensed.