Learn JavaScript and Ajax with W3Schools [2010, PDF, ENG]

Introduction .................................................1
JavaScript ........................................................................................... 1
AJAX.................................................................................................. 3
How To Use This Book ...................................................................... 4

Section I: JavaScript Basic .............................7
CHAPTER 1: JavaScript How To and Where To .............. 9
How To Put a JavaScript into an HTML Page .................................... 9
How to Handle Simple Browsers...................................................... 12
Where to Put the JavaScript ............................................................. 12
Using an External JavaScript ............................................................ 15

CHAPTER 2: JavaScript Statements and Comments...... 16
JavaScript Statements ....................................................................... 16
JavaScript Comments ....................................................................... 18

CHAPTER 3: JavaScript Variables .................................. 23
Do You Remember Algebra from School?......................................... 23
JavaScript Variables .......................................................................... 23
Declaring (Creating) JavaScript Variables ......................................... 25
Assigning Values to Undeclared JavaScript Variables ......................... 25
Redeclaring JavaScript Variables ....................................................... 26
JavaScript Arithmetic ....................................................................... 26

CHAPTER 4: JavaScript Operators ................................ 27
JavaScript Arithmetic Operators ....................................................... 27
JavaScript Assignment Operators...................................................... 28
The + Operator Used on Strings....................................................... 28
Adding Strings and Numbers ........................................................... 28

CHAPTER 5: JavaScript Comparisons ........................... 30
Comparison Operators..................................................................... 30
How to Use Comparisons ................................................................ 31
Logical Operators ............................................................................. 31
Conditional Operator....................................................................... 31

CHAPTER 6: JavaScript If...Else Statements .................. 32
Conditional Statements .................................................................... 32
if Statement...................................................................................... 33
if...else Statement ............................................................................. 34
if...else if...else Statement.................................................................. 36

CHAPTER 7: JavaScript Loops ...................................... 39
The for Loop.................................................................................... 39
The while Loop................................................................................ 41
The do...while Loop ......................................................................... 43

CHAPTER 8: Additional JavaScript Flow Control Statements .............46
The break Statement ........................................................................ 46
The continue Statement ................................................................... 47
JavaScript for...in Statement ............................................................. 48
JavaScript switch Statement.............................................................. 50

CHAPTER 9: JavaScript Popup Boxes............................ 53
Popup Boxes..................................................................................... 53

CHAPTER 10: JavaScript Functions .............................. 58
How to Define a Function................................................................ 58
JavaScript Function Examples .......................................................... 59
The return Statement ....................................................................... 62
The Lifetime of JavaScript Variables ................................................. 63

CHAPTER 11: JavaScript Events.................................... 64
onLoad and onUnload ..................................................................... 64
onFocus, onBlur, and onChange ...................................................... 65
onSubmit ......................................................................................... 65
onMouseOver and onMouseOut...................................................... 66
onClick ............................................................................................ 66

CHAPTER 12: Javascript try...catch and throw Statements............. 67
JavaScript—Catching Errors ............................................................ 67
The try...catch Statement.................................................................. 67
The throw Statement........................................................................ 70

CHAPTER 13: JavaScript Special Characters and Guidelines ............ 73
Insert Special Characters................................................................... 73
JavaScript Is Case Sensitive ............................................................... 74
White Space ..................................................................................... 74
Break up a Code Line....................................................................... 74

Section II: JavaScript Objects ......................77
CHAPTER 14: JavaScript Objects Intro......................... 79
Object-Oriented Programming ........................................................ 79
Properties ......................................................................................... 79
Methods ........................................................................................... 80

CHAPTER 15: JavaScript String Object......................... 81
String Object.................................................................................... 81
Examples .......................................................................................... 82

CHAPTER 16: JavaScript Date Object........................... 88
Create a Date Object........................................................................ 88
Set Dates .......................................................................................... 89
Compare Two Dates......................................................................... 89
Examples .......................................................................................... 90

CHAPTER 17: JavaScript Array Object.......................... 95
What Is an Array?............................................................................. 95
Create an Array ................................................................................ 96
Access an Array ................................................................................ 96
Modify Values in an Array ................................................................ 96
Examples .......................................................................................... 97

CHAPTER 18: JavaScript Boolean Object ................... 107
Create a Boolean Object................................................................. 107
Examples ........................................................................................ 108

CHAPTER 19: JavaScript Math Object........................ 110
Math Object .................................................................................. 110
Mathematical Constants................................................................. 110
Mathematical Methods................................................................... 111
Examples ........................................................................................ 112

CHAPTER 20: JavaScript RegExp Object .................... 115
What Is RegExp? ............................................................................ 115
RegExp Modifiers........................................................................... 116
test()............................................................................................... 118
exec().............................................................................................. 119

Section III: JavaScript Advanced................121
CHAPTER 21: JavaScrip Browser Detection ................ 123
Browser Detection.......................................................................... 123
The Navigator Object .................................................................... 124

CHAPTER 22: JavaScript Cookies ............................... 129
What Is a Cookie? .......................................................................... 129
Create and Store a Cookie .............................................................. 130

CHAPTER 23: JavaScript Form Validation .................. 134
Required Fields............................................................................... 134
E-mail Validation ........................................................................... 136

CHAPTER 24: JavaScript Animation ........................... 138
The HTML Code .......................................................................... 138
The JavaScript Code....................................................................... 139
The Entire Code ............................................................................ 139

CHAPTER 25: JavaScript Image Maps......................... 141
HTML Image Maps ....................................................................... 141
Adding Some JavaScript ................................................................. 142

CHAPTER 26: JavaScript Timing Events ..................... 144
The setTimeout() Method.............................................................. 144
The clearTimeout() Method........................................................... 149

CHAPTER 27: Create Your Own Objects with JavaScript.................151
JavaScript Objects .......................................................................... 151
Creating Your Own Objects ........................................................... 152

Section IV: AJAX Basic...............................157
CHAPTER 28: AJAX XMLHttpRequest...................... 159
AJAX Uses the XMLHttpRequest Object....................................... 159
The XMLHttpRequest Object ....................................................... 159
Your First AJAX Application .......................................................... 160

CHAPTER 29: AJAX Browser Support ........................ 163
The XMLHttpRequest ................................................................... 163
All Together Now ........................................................................... 164

CHAPTER 30: AJAX—The XMLHttpRequest Object’s Methods and Properties... 166
Important Methods ........................................................................ 166
Sending an AJAX Request to a Server............................................. 167
Important Properties ...................................................................... 167
The responseText Property ............................................................. 167
XMLHttpRequest Open—Using False........................................... 167
XMLHttpRequest Open—Using True ........................................... 168
The readyState Property ................................................................. 168
The onreadystatechange Property ................................................... 169

CHAPTER 31: AJAX Server......................................... 170
XMLHttpRequest Object Can Request Any Data .......................... 170
Requesting Files ............................................................................. 170
Submitting Forms .......................................................................... 171

Section V: AJAX Advanced ........................173
CHAPTER 32: AJAX Suggest ...................................... 175
The HTML Form .......................................................................... 175
The showHint() Function .............................................................. 176
The GetXmlHttpObject() Function............................................... 177
The stateChanged() Function......................................................... 177
AJAX Suggest Source Code ............................................................ 178

CHAPTER 33: AJAX Database Example...................... 184
The AJAX JavaScript ...................................................................... 185
The AJAX Server Page.................................................................... 186

CHAPTER 34: AJAX XML Example ........................... 188
The AJAX JavaScript ...................................................................... 189
The AJAX Server Page.................................................................... 190
The XML File ................................................................................ 191

CHAPTER 35: AJAX ResponseXML Example ............. 198
The AJAX JavaScript ...................................................................... 199
The AJAX Server Page.................................................................... 201
Appendixes ..............................................203
Appendix A: JavaScript Objects ....................................................................... 203
Appendix B: HTML DOM Objects................................................................214
Index ........................................................ 245