本书是为帮助国内技术人员在第一时间了解国外最新的计算机技术所编写的。该书共分14章，具体内容包括基本的JavaScript逻辑；在多浏览器并存的Web世界里可靠地使用JavaScript的技巧；JavaScript的各种扩展机制以及它们与传统面向对象编程的区别；处理传统JavaScript任务等。该书可供广大JavaScript爱好者阅读使用。

无论你是从头开始学习JavaScript，还是只想复习一下，《学习JavaScript》都为你提供了一条穿越JavaScript内在能量与外在特性的捷径。

JavaScript作为Ajax的关键部分又重新回到了聚光灯下，赋予网站更多的智能并给访客提供更有用的交互内容。JavaScript亦已超越Web而蔓延至编程领域，给其他软件提供了一种便利的脚本语言。

本书中基于Web的实例展示了如何构建JavaScript逻辑、如何将其与现有的对象结构相连接以及如何构建你的程序库和利用他人编写的程序库。

《学习JavaScript》将探索以下主题：基本的JavaScript逻辑，从函数、操作符到控制结构；在多浏览器并存的Web世界里可靠地使用JavaScript的技巧；JavaScript的各种扩展机制以及它们与传统面向对象编程的区别；处理传统JavaScript任务，如表单验证、DOM操作和交互样式；JavaScript的安全性，包括Web浏览器沙箱、cookie以及与其他对象的交互；创建对象库以处理一般任务；用JavaScript和XML HttpRequest对象构建Ajax应用程序；为特殊效果和Ajax交互使用程序库。

无论你是曾经使用过一些JavaScript的Web设计者、需要学习JavaScript的程序员，还是仅仅想在Web上做一点东西的开发新手，《学习JavaScript》都将告诉你如何把这个强大的脚本语言用于应对你所遇到的最新挑战。

Preface

 1. Introduction and First Looks

Twisted History: Specs and Implementations

Cross-Browser Incompatibility and Other Common JavaScript Myths

What You Can Do with JavaScript

First Look at JavaScript: "Hello World!"

The JavaScript Sandbox

Accessibility and JavaScript Best Practices

 2. JavaScript Data Types and Variables

Identifying Variables

Scope

Simple Types

Constants: Named but Not Variables

Questions

 3. Operators and Statements

Format of a JavaScript Statement

Simple Statements

Conditional Statements and Program Flow

The Conditional Operators

The Logical Operators

Advanced Statements: The Loops

Questions

 4. The JavaScript Objects

The Object Constructor

The Number Object

The String Object

Regular Expressions and RegExp

Purposeful Objects: Date and Math

JavaScript Arrays

Associative Arrays: The Arrays That Aren't

Questions

 5. Functions

Defining a Function: Let Me Count the Ways

Callback Functions

Functions and Recursion

Nested Functions, Function Closure, and Memory Leaks

Function As Object

Questions

 6. Catching Events

The Event Handler at DOM Level O

Questions

 7. Forms and JiT Validation

Accessing the Form

Attaching Events to Forms: Different Approaches

Selection

Radio Buttons and Checkboxes

Input Fields and JiT Regular Expressions

Questions

 8. The Sandbox and Beyond: Cookies, Connectivity, and Piracy

The Sandbox

All About Cookies

Alternative Storage Techniques

Cross-Site Scripting (XSS)

Questions

 9. The Basic Browser Objects

BOM at a Glance

The window Object

Frames and Location

history, screen, and navigator

The all Collection, Inner/Outer HTML and Text, and Old and New Documents

Something Old, Something New

Questions

 10. DOM: The Document Object Model

A Tale of Two Interfaces

The DOM and Compliant Browsers

The DOM HTML API

Understanding the DOM: The Core API

The DOM Core Document Object

Element and Access in Context

Modifying the Tree

Questions

 11. Creating Custom lavaScript Objects

The JavaScript Object and Prototyping

Creating Your Own Custom JavaScript Objects

Object Detection, Encapsulation, and Cross-Browser Objects

Chaining Constructors and JS Inheritance

One-Off Objects

Advanced Error-Handling Techniques (try, throw, catch)

What's New in JavaScript

Questions

 12. Building Dynamic Web Pages: Adding Style to Your Script

DHTML: JavaScript, CSS, and DOM

Fonts and Text

Position and Movement

Size and Clipping

Display, Visibility, and Opacity

Questions

 13. Moving Outside the Page with Ajax

Ajax: It's Not Only Code

How Ajax Works

Hello Ajax World!

The Ajax Object: XMLHttpRequest and IE's ActiveX Objects

Working with XML—or Not

Google Maps

Questions

 14. Good News: Juicy Libraries! Amazing Web Services! Fun APIs!

Before Jumping In, A Word of Caution

Working with Prototype

Script.aculo.us: More Than the Sum of Its Periods

Sabre's Rico

Dojo

The Yahoo! UI

MochiKit

Questions

Appendix: Answers

Index