Table of Contents

Preface xi
Chapter 1 Introduction to JavaScript 1
      1.1  Executable Content: JavaScript in a Web Page 2
      1.2  JavaScript Myths 4
      1.3  What JavaScript Can Do 5
      1.4  What JavaScript Can't Do 10
      1.5  An Example: Calculating Your Taxes with JavaScript 10
      1.6  Flavors and Versions of JavaScript 16
      1.7  JavaScript Security 20
      1.8  Using the Rest of This Book 20
      1.9  Exploring JavaScript 22
Part 1 Core JavaScript 25
Chapter 2 Lexical Structure 27
      2.1  Case Sensitivity 27
      2.2  Whitespace and Line Breaks 28
      2.3  Optional Semicolons 29
      2.4  Comments 29
      2.5  Literals 29
      2.6  Identifiers 33
      2.7  Reserved Words 34
Chapter 3 Variables and Data Types 37
      3.1  Variables 37
      3.2  Numbers 39
      3.3  Strings 41
      3.4  Boolean Values 42
      3.5  Functions 43
      3.6  Objects 44
      3.7  Arrays 45
      3.8  Null 45
      3.9  Undefined 45
      3.10  The Date Object 46
      3.11  Data Type Wrapper Objects 47
Chapter 4 Expressions and Operators 49
      4.1  Expressions 49
      4.2  Operator Overview 50
      4.3  Arithmetic Operators 53
      4.4  Comparison Operators 55
      4.5  String Operators 57
      4.6  Logical Operators 59
      4.7  Bitwise Operators 59
      4.8  Assignment Operators 61
      4.9  Miscellaneous Operators 63
Chapter 5 Statements 69
      5.1  Expression Statements 69
      5.2  Compound Statements 70
      5.3  if 71
      5.4  while 73
      5.5  for 74
      5.6  for...n 75
      5.7  break 76
      5.8  continue 77
      5.9  with 77
      5.10  var 79
      5.11  function 80
      5.12  return 81
      5.13  The Empty Statement 82
      5.14  Summary of JavaScript Statements 82
Chapter 6 Functions 85
      6.1  Defining and Invoking Functions 85
      6.2  Functions as Data Types 87
      6.3  The Function Object 90
      6.4  Built-in Functions 98
      6.5  Event Handlers 98
Chapter 7 Objects 101
      7.1  Object Properties 101
      7.2  Creating New Objects with Constructors 102
      7.3  Methods 104
      7.4  Object Prototypes 106
      7.5  Classes in JavaScript 110
      7.6  Objects as Associative Arrays 114
      7.7  Special Object Methods 116
Chapter 8 Arrays 121
      8.1  Array Elements 121
      8.2  Multidimensional Arrays 123
      8.3  Array/Object Dual Nature 123
      8.4  Creating Arrays 124
      8.5  Array Length Property 125
      8.6  Array Methods 126
      8.7  Arrays in Navigator 2.0 128
      8.8  Built-in Arrays 130
      8.9  Array Summary 130
Chapter 9 Further Topics in JavaScript 133
      9.1  Automatic Data Type Conversion 133
      9.2  Explicit Data Type Conversions 141
      9.3  By Value vs. By Reference 144
Part 2 Client-Side JavaScript 153
Chapter 10 Client-Side Program Structure 155
      10.1  The <\|SCRIPT\|> Tag 156
      10.2  Including JavaScript Files 159
      10.3  JavaScript and Events 160
      10.4  JavaScript in URLs 165
      10.5  JavaScript Entities 166
      10.6  Execution of JavaScript Programs 167
      10.7  JavaScript and Threads 172
Chapter 11 Windows and the JavaScript Name Space 175
      11.1  The Implicit Window Reference 175
      11.2  Multiple Windows and Explicit Window References 176
      11.3  Windows and Frames 179
      11.4  Window and Frame Names 181
      11.5  The JavaScript Name Space 182
      11.6  Window and Variable Lifetime 186
      11.7  Garbage Collection 187
      11.8  The JavaScript Object Hierarchy 192
Chapter 12 Programming with Windows 195
      12.1  Simple Dialogs 195
      12.2  Opening and Closing Windows 197
      12.3  The Status Line 200
      12.4  Frame Programming Techniques 203
      12.5  Other Window Programming Techniques 207
Chapter 13 The Navigator, Location, and History Objects 209
      13.1  The Navigator, MimeType, and Plugin Objects 209
      13.2  The Location Object 213
      13.3  The History Object 215
Chapter 14 Documents and Their Contents 219
      14.1  The Document Object 219
      14.2  The Link Object 226
      14.3  The Anchor Object 229
      14.4  The JavaObject Object 229
Chapter 15 Saving State with Cookies 231
      15.1  An Overview of Cookies 231
      15.2  Reading Cookies 233
      15.3  Storing Cookies 233
      15.4  Cookie Limitations 234
      15.5  Cookie Example 235
Chapter 16 Special Effects with Images 239
      16.1  Image Replacement with the Image.src Property 239
      16.2  Off-Screen Images and Caching 240
      16.3  Image Event Handlers 241
      16.4  Other Image Properties 242
      16.5  Image Replacement Example 243
      16.6  Other Image Techniques 247
Chapter 17 Forms and Form Elements 249
      17.1  Forms in CGI and JavaScript 249
      17.2  The Form Object 250
      17.3  Form Elements 252
      17.4  Form Element Names and Values 257
      17.5  Naming Forms and Form Elements 259
      17.6  Form Verification Example 261
Chapter 18 Compatibility Techniques 265
      18.1  Platform, Browser, and Version-Specific Compatibility 266
      18.2  Compatibility with Non-JavaScript Browsers 269
      18.3  Compatibility with JavaScript 1.0 Browsers 274
      18.4  Compatibility Through CGI Scripts 280
Chapter 19 LiveConnect: JavaScript and Java 281
      19.1  Overview of LiveConnect 281
      19.2  LiveConnect Data Types 282
      19.3  LiveConnect Data Conversion 288
      19.4  JavaScript Conversion of JavaObjects 293
      19.5  Scripting Java with JavaScript 295
      19.6  Using JavaScript from Java 299
      19.7  Working with Java in Internet Explorer 306
      19.8  Summary 308
Chapter 20 JavaScript Security 311
      20.1  JavaScript and Security 311
      20.2  Security Holes and Security Hobbles 313
      20.3  The domain Property 317
      20.4  The Data-Tainting Security Model 317
Part 3 Reference 323
Part 4 Appendices 579
 A JavaScript Resources on the Internet 581
 B Known Bugs 585
 C Differences between Navigator 2.0 and 3.0 599
 D JavaScript Incompatibilities in Internet Explorer 3.0 605
 E A Preview of Navigator 4.0 611
 F Persistent Client State: HTTP Cookies 615
 G JavaScript and HTML Color Names and Values 623
 H LiveConnected Navigator Plug-Ins 627
Index 631

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