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Introduction xix
Chapter 1: Introduction to Javascript and the Web 1 Introduction to JavaScript 1 What is JavaScript? 2 JavaScript and the Web 3 What Can JavaScript Do for Me? 4 Tools Needed to Create JavaScript Web Applications 4 Development Tools 4 Web Browsers 5 Where Do My Scripts Go? 7 Linking to an External JavaScript File 7 Advantages of Using an External File 8 Your First Simple JavaScript Program 9 Writing More JavaScript 10 A Brief Look at Browsers and Compatibility Problems 15 Summary 16
Chapter 2: Data Types and Variables 17 Types of Data in JavaScript 18 Numerical Data 18 Text Data 19 Boolean Data 20 Variables--Storing Data in Memory 20 Creating Variables and Giving Them Values 22 Assigning Variables with the Value of Other Variables 24 Using Data--Calculations and Basic String Manipulation 26 Numerical Calculations 26 Increment and Decrement Operators 29 Operator Precedence 30 Basic String Operations 35 Mixing Numbers and Strings 37 Data Type Conversion 38 Dealing with Strings That Won''t Convert 41 Arrays 43 A MultiDimensional Array 47 Summary 52
Chapter 3: Decisions and Loops 55 Decision Making--The if and switch Statements 56 Comparison Operators 56 Precedence 57 Assignment versus Comparison 57 Assigning the Results of Comparisons 58 The if Statement 58 Logical Operators 62 AND 63 OR 64 NOT 64 Multiple Conditions Inside an if Statement 65 else and else if 69 Comparing Strings 70 The switch Statement 71 Executing the Same Code for Different Cases 75 Looping--The for and while Statements 76 The for Loop 76 The for...in Loop 80 The while Loop 80 The do...while loop 82 The break and continue Statements 83 Summary 84
Chapter 4: Functions and Scope 87 Creating Your Own Functions 88 Scope and Lifetime 92 Global Scope 92 Functional Scope 93 Identifier Lookup 93 Functions as Values 94 Summary 97
Chapter 5: Javascript--An ObjectBased Language 99 ObjectBased Programming 100 What are Objects? 100 Objects in JavaScript 100 Using JavaScript Objects 101 Creating an Object 102 Using an Object''s Properties 103 Calling an Object''s Methods 104 Primitives and Objects 104 JavaScript''s Native Object Types 105 String Objects 105 The length Property 106 Finding a String Inside Another String--The indexOf() and lastIndexOf() Methods 106 Copying
Part of a String--The substr() and substring() Methods 109 Converting Case--The toLowerCase() and toUpperCase() Methods 110 Selecting a Single Character from a String--The charAt() and charCodeAt() Methods 111 Converting Character Codes to a String--The fromCharCode() Method 115 Removing Leading and Trailing Whitespace--The trim() Method 115 Array Objects 116 Finding Out How Many Elements are in an Array--The length Property 116 Adding Elements--The push() Method 117 Joining Arrays--The concat() Method 117 Copying
Part of an Array--The slice() Method 118 Converting an Array into a Single String--The join() Method 119 Putting Your Array in Order--The sort() Method 119 Putting Your Array into Reverse Order--The reverse() Method 121 Finding Array Elements--The indexOf() and lastIndexOf() Methods 122 Iterating through an Array without Loops 123 The Math Object 126 The abs() Method 127 Finding the Largest and Smallest Numbers--The min() and max() Methods 127 Rounding Numbers 127 The random() Method 131 The pow() Method 132 Number Objects 134 The toFixed() Method 134 Date Objects 135 Creating a Date Object 135 Getting Date Values 136 Setting Date Values 139 Calculations and Dates 140 Getting Time Values 140 Setting Time Values 143 Creating Your Own Custom Objects 144 Creating New Types of Objects (Reference Types) 148 Defining a Reference Type 149 Creating and Using Reference Type Instances 150 Summary 151
Chapter 6: String Manipulation 153 Additional String Methods 154 The split() Method 154 The replace() Method 156 The search() Method 157 The match() Method 157 Regular Expressions 158 Simple Regular Expressions 159 Regular Expressions: Special Characters 162 Text, Numbers, and Punctuation 162 Repetition Characters 165 Position Characters 166 Covering All Eventualities 170 Grouping Regular Expressions 171 Reusing Groups of Characters 173 The String Object 175 The split() Method 175 The replace() Method 177 The search() Method 179 The match() Method 180 Using the RegExp Object''s Constructor 183 Telephone Number Validation 185 Validating a Postal Code 187 Validating an Email Address 189 Validating a Domain Name 189 Validating a Person''s Address 190 Validating the Complete Address 190 Summary 191
Chapter 7: Date, Time, and Timers 193 World Time 194 Setting and Getting a Date Object''s UTC Date and Time 197 Timers in a Web Page 200 OneShot Timer 200 Setting a Timer that Fires at Regular Intervals 202 Summary 203
Chapter 8: Programming the Browser 205 Introduction to the Browser''s Objects 206 The window Object 207 The history Object 208 The location Object 209 The navigator Object 210 The geolocation Object 210 The screen Object 213 The document Object 213 Using the document Object 214 The images Collection 216 The links Collection 218 Determining the User''s Browser 218 Feature Detection 218 Browser Sniffing 221 Summary 225
Chapter 9: DOM Scripting 229 The Web Standards 231 HTML 232 ECMAScript 233 The Document Object Model 234 The DOM Standard 234 Level 0 234 Level 1 234 Level 2 235 Level 3 235 Level 4 235 Browser Compliance with the Standards 235 Differences between the DOM and the BOM 236 Representing the HTML Document as a Tree Structure 236 What is a Tree Structure? 236 An Example HTML Page 237 The Core DOM Objects 238 Base DOM Objects 238 HighLevel DOM Objects 239 DOM Objects and Their Properties and Methods 240 The Document Object and its Methods 240 The Element Object 246 The Node Object 250 Manipulating the DOM 259 Accessing Elements 259 Changing Appearances 259 Using the style Property 259 Changing the class Attribute 262 Positioning and Moving Content 263 Example: Animated Advertisement 264 Are We There Yet? 264 Performing the Animation 265 Summary 268
Chapter 10: Events 271 Types of Events 272 Connecting Code to Events 273 Handling Events via HTML Attributes 273 Handling Events via Object Properties 280 The Standard Event Model 283 Connecting Code to Events--The Standard Way 283 Using Event Data 289 Event Handling in Old Versions of Internet Explorer 298 Accessing the event Object 298 Using Event Data 300 Writing CrossBrowser Code 307 Native Drag and Drop 317 Making Content Draggable 318 Creating a Drop Target 319 Transferring Data 325 Summary 333
Chapter 11: HTML Forms: Interacting With the User 335 HTML Forms 336 Traditional Form Object Properties and Methods 338 HTML Elements in Forms 339 Common Properties and Methods 340 The name Property 340 The value Property 340 The form Property 340 The type Property 340 The focus() and blur() Methods 340 Button Elements 341 Text Elements 345 The Text Box 345 Problems with Firefox and the blur Event 350 The Password Text Box 351 The Hidden Text Box 351 The textarea Element 351 Check Boxes and Radio Buttons 355 Selection Boxes 364 Adding and Removing Options 365 Adding New Options with Standard Methods 369 Select Element Events 370 HTML5 Form Object Properties and Methods 375 New Input Types 376 New Elements 380 The Element 380 The and Elements 382 Summary 386
Chapter 12: JSON 391 XML 392 JSON 393 Simple Values 394 Objects 394 Arrays 395 Serializing Into JSON 396 Parsing JSON 396 Summary 400
Chapter 13: Data Storage 403 Baking Your First Cookie 404 A FreshBaked Cookie 404 Viewing Cookies in Internet Explorer 404 Viewing Cookies in Firefox 409 Viewing Cookies in Chrome 411 The Cookie String 413 name and value 413 expires 413 path 414 domain 415 secure 416 Creating a Cookie 416 Getting a Cookie''s Value 419 Cookie Limitations 424 A User May Disable Cookies 424 Number and Information Limitation 425 Cookie Security and IE 425 Web Storage 426 Setting Data 427 Getting Data 428 Removing Data 428 Stor