Wiley Global Education UK

Developing Web Applications

Ralph Moseley

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Table of contents

Front Matterxix
Prefacexix
INTRODUCTIONxix
FEATURESxx
ADDITIONAL MATERIALSxx
TRADEMARKSxx
ACKNOWLEDGMENTSxxi
1 THE WAY THE WEB WORKS1
1.1 HISTORY2
1.1.1 The WWW2
1.2 THE INTERNET AND THE WWW3
Figure 1-1 How computers link to the Internet4
Table 1-1 OSI model4
Table 1-2 Internet layered model5
Checkpoint!6
1.3 PROTOCOLS AND PROGRAMS6
1.3.1 Files6
Table 1-3 FTP command set8
Test Yourself!8
1.3.2 Problems with FTP8
Checkpoint!9
1.3.3 Email9
1.3.4 Instant Messaging10
1.3.5 Remote Machine Access10
1.3.6 Web Pages11
Test Yourself!13
1.4 SECURE CONNECTIONS14
Table 1-4 Transfer of various media and appropriate attributes15
Checkpoint!15
1.5 APPLICATIONS AND DEVELOPMENT TOOLS15
Resources!16
1.6 THE WEB BROWSER17
1.6.1 Choices18
Test Yourself!19
Checkpoint!19
1.7 CHAPTER SUMMARY19
Chapter Quiz20
Key Words and Phrases20
Useful Web Addresses21
2 THE CLIENT SIDE: HTML23
2.1 INTRODUCTION24
2.2 THE DEVELOPMENT PROCESS24
2.2.1 Requirements24
2.2.2 Design24
2.2.3 Write Code24
2.2.4 Test24
2.2.5 Upload25
2.2.6 Re-Iterate25
Checkpoint!25
2.3 BASIC HTML25
2.3.1 Loading Pages with the Browser25
2.3.2 A Page on the Web26
2.3.3 HTML Document Structure26
2.4 FORMATTING AND FONTS27
Test Yourself!28
2.4.1 Using Types of Emphasis28
2.4.2 Pre-Formatted Text28
Table 2-1 Adding emphasis29
2.4.3 Font Sizes29
Table 2-2 Font comparison29
Test Yourself!30
2.5 COMMENTING CODE31
2.6 COLOR31
Table 2-3 Number base conversion32
Table 2-4 Some example colors with codes32
Test Yourself!33
2.7 HYPERLINKS33
Checkpoint!34
2.8 LISTS34
2.8.1 Unordered Lists34
2.8.2 Ordered Lists35
2.8.3 Nested Lists35
2.8.4 Definition Lists36
2.9 TABLES36
2.9.1 Table Structure37
2.9.2 Table Headers38
Figure 2-1 A simple HTML table38
2.9.3 Irregular Tables38
Figure 2-2 An irregularly shaped HTML table39
2.9.4 Tables and Page Layout40
Test Yourself!41
2.10 IMAGES41
2.10.1 Positioning and Placing Images41
2.10.2 Resizing an Image42
2.10.3 Background Images42
Checkpoint!43
2.11 SIMPLE HTML FORMS43
2.11.1 Making a Form43
2.11.2 Types of Input43
2.11.3 Text Areas44
2.11.4 Drop Down Menus45
Listing 2-1 Summarizing simple HTML forms46
Test Yourself!46
Figure 2-3 A simple HTML form47
2.12 WEB SITE STRUCTURE47
Figure 2-4 Mapping a Web site48
Checkpoint!48
2.13 CHAPTER SUMMARY48
Chapter Quiz49
Key Words and Phrases49
Useful Web Addresses50
3 FROM HTML TO XHTML51
3.1 MORE HISTORY, MORE STANDARDS52
3.1.1 Changes52
3.1.2 XML53
Checkpoint!54
3.2 THE MOVE TO XHTML55
Table 3-1 Available character sets55
Table 3-2 Human language codes57
3.2.1 Document Structure57
3.2.2 Some Other Differences57
Checkpoint!58
Test Yourself!58
3.3 META TAGS58
3.3.1 Memory Cache60
3.3.2 Formatting with scheme60
Test Yourself!61
3.4 CHARACTER ENTITIES61
Test Yourself!63
Table 3-3 Useful character entities63
3.5 FRAMES AND FRAMESETS64
3.5.1 Rows64
Figure 3-1 Basic frames in rows66
3.5.2 Alternative Content66
3.5.3 Columns66
3.5.4 Frames Using Columns and Rows67
3.5.5 Nesting Frames67
Figure 3-2 Basic frames using columns and rows68
Figure 3-3 Nesting frames69
3.5.6 Inline Frames69
Figure 3-4 Using an iframe70
Checkpoint!71
Test Yourself!71
3.6 WHAT IS INSIDE A BROWSER?71
Figure 3-5 Architecture of a browser72
Checkpoint!72
Test Yourself!72
3.7 CHAPTER SUMMARY73
Chapter Quiz73
Key Words and Phrases73
Useful Web Addresses74
4 GETTING SOME STYLE: CSS75
4.1 THE NEED FOR CSS76
4.2 INTRODUCTION TO CSS77
4.3 BASIC SYNTAX AND STRUCTURE77
4.3.1 Rules77
4.3.2 Classes78
4.3.3 ID79
4.3.4 Pseudo-Class Selectors80
Checkpoint!80
4.4 USING CSS81
4.4.1 External Style Sheets81
Listing 4-1 External CSS file81
4.4.2 Embedded Style Sheets82
4.5 BACKGROUND IMAGES, COLORS AND PROPERTIES83
4.5.1 Background Color83
4.5.2 Background Images84
Figure 4-1 Using a background image85
Table 4-1 The background property86
Checkpoint!87
4.6 MANIPULATING TEXT87
4.6.1 Text Decoration88
4.6.2 Text Indentation89
4.6.3 Text Case90
4.7 USING FONTS90
Test Yourself!91
4.8 BORDERS AND BOXES91
Table 4-2 The border property92
4.9 MARGINS93
4.10 PADDING94
Table 4-3 The padding property95
4.11 LISTS95
Table 4-4 The list property96
4.12 POSITIONING USING CSS96
4.12.1 Absolutely!97
Listing 4-2 Absolute Positioning97
4.12.2 It's All Relative98
4.12.3 The Z-index98
4.12.4 Shaping an Element99
4.12.5 Floating Elements100
4.12.6 Layout and Structure100
Listing 4-3 Using div sections101
Figure 4-2 The finished page102
Test Yourself!102
4.13 CSS2102
Checkpoint!103
4.14 CHAPTER SUMMARY103
Chapter Quiz104
Key Words and Phrases104
Useful Web Addresses105
5 JAVASCRIPT: INTRODUCTION TO CLIENT SIDE SCRIPTING107
5.1 WHAT IS JAVASCRIPT?108
5.2 HOW TO DEVELOP JAVASCRIPT109
5.3 SIMPLE JAVASCRIPT109
5.3.1 Embedded109
Listing 5-1 A simple JavaScript program110
5.3.2 External Scripts110
Checkpoint!111
5.4 VARIABLES111
5.4.1 Scope112
Listing 5-2 Script showing use of scope for variables113
Test Yourself!113
5.4.2 Assignments113
Table 5-1 Special assignment operators114
5.4.3 Strings114
Table 5-2 Escape sequences115
5.4.4 Arrays115
Table 5-3 Some methods attached to the string object116
Test Yourself!116
Checkpoint!116
5.5 FUNCTIONS117
Listing 5-3 Script showing use of function with parameters118
5.6 CONDITIONS118
Table 5-4 Conditional operators119
5.6.1 Switch119
Listing 5-4 Script showing use of case statement120
5.6.2 Conditional Operator120
5.7 LOOPS AND REPETITION121
Test Yourself!121
Table 5-5 JacaScript loop structures122
Checkpoint!122
5.8 CHAPTER SUMMARY122
Chapter Quiz123
Key Words and Phrases123
Useful Web Addresses124
6 JAVASCRIPT: DEVELOPING MORE ADVANCED SCRIPTS125
6.1 JAVASCRIPT AND OBJECTS126
6.1.1 What is an Object?126
6.2 JAVASCRIPT'S OWN OBJECTS126
Table 6-1 The JavaScript Math object127
Test Yourself!127
6.2.1 User-defined Objects128
Listing 6-1 Using object literals128
Listing 6-2 Making a first object129
6.2.2 Adding a Constructor129
Listing 6-3 Using a constructor130
6.2.3 Methods130
Listing 6-4 Attaching methods to an object131
Test Yourself!132
Checkpoint!132
6.3 THE DOM AND THE WEB BROWSER ENVIRONMENT133
Figure 6-1 The hierarchy of objects under window133
Listing 6-5 Using the window object134
Table 6-2 Some important window object properties135
Test Yourself!136
6.3.1 The document Object136
Listing 6-6 One way to access form fields137
Listing 6-7 Extracting form information138
Test Yourself!139
Checkpoint!139
6.4 FORMS AND VALIDATION139
Listing 6-8 Validating a user139
Test Yourself!141
6.4.1 Using Regular Expressions for Validation142
Listing 6-9 Using a regular expression to validate an email142
Test Yourself!143
Checkpoint!144
6.5 CHAPTER SUMMARY144
Chapter Quiz144
Key Words and Phrases144
Useful Web Addresses145
7 DHTML147
7.1 COMBINING HTML, CSS AND JAVASCRIPT148
7.1.1 Animation148
Listing 7-1 Dynamic effects148
Listing 7-2 Basic image flipping149
Figure 7-1 Select the Picture150
Checkpoint!150
7.1.2 The Image Object150
Table 7-1 The Image object151
Listing 7-3 Simple animation153
Listing 7-4 Moving objects around the browser window154
Checkpoint!155
Test Yourself!155
7.2 EVENTS AND BUTTONS156
Table 7-2 JavaScripts events156
7.2.1 The Window157
7.2.2 The Mouse157
7.2.3 The Keyboard157
7.2.4 Using Events157
Listing 7-5 A basic window event being captured157
Listing 7-6 Using a mouse click158
Listing 7-7 Buttons for events158
Listing 7-8 Using mouseover159
Listing 7-9 More mouse events159
Listing 7-10 Using onmousemove and compatibility checks160
Listing 7-11 Keyboard input162
Test Yourself!163
7.3 CONTROLLING YOUR BROWSER163
Checkpoint!165
Test Yourself!165
7.4 CHAPTER SUMMARY165
Chapter Quiz165
Key Words and Phrases165
Useful Web Addresses166
8 XML: EXTENSIBLE MARKUP LANGUAGE167
8.1 INTRODUCTION TO XML168
8.2 THE MANY USES OF XML168
8.3 SIMPLE XML168
Listing 8-1 A simple XML document169
8.4 XML KEY COMPONENTS169
8.4.1 Elements169
8.4.2 Attributes170
8.4.3 Other Essentials170
8.4.4 Namespaces171
Checkpoint!171
Test Yourself!172
8.5 DOCUMENT TYPE DEFINITIONS AND SCHEMAS172
8.5.1 DTDs172
Listing 8-2 A simple DTD172
Listing 8-3 DTD as an external file173
Listing 8-4 The referring XML document173
Table 8-1 DTD174
Table 8-2 DTD attribute types175
Table 8-3 Attribute required or default175
8.5.2 Schemas175
Listing 8-5 Equivalent XML schema176
Listing 8-6 Referring to a schema in an XML document176
8.5.3 Elements177
8.5.4 Attributes178
8.6 WELL FORMED?178
Checkpoint!179
Test Yourself!179
8.7 USING XML WITH APPLICATIONS179
Listing 8-7 Using data islands180
8.8 CHAPTER SUMMARY180
Chapter Quiz180
Key Words and Phrases181
Useful Web Addresses181
9 XML, XSL AND XSLT: TRANSFORMING XML183
9.1 INTRODUCING XSL184
9.2 XML TRANSFORMED184
Checkpoint!184
9.3 A SIMPLE EXAMPLE185
Figure 9-1 Output from Listing 9-1186
Listing 9-1 A simple XML document187
Checkpoint!187
9.3.1 The XML188
9.3.2 The Style Sheet188
9.3.3 Linking188
Test Yourself!188
9.4 XSL ELEMENTS189
9.4.1 Value-of189
9.4.2 For-each189
9.4.3 sort189
Listing 9-2 Using <xsl:sort>190
9.4.4 If190
Listing 9-3 Using a condition191
9.4.5 Choices191
Listing 9-4 Multiple choices192
9.4.6 Applying Templates192
Listing 9-5 Applying multiple templates193
Checkpoint!193
Test Yourself!194
9.5 TRANSFORMING WITH XSLT194
9.5.1 Using JavaScript194
Listing 9-6 Processing XML with JavaScript195
Checkpoint!195
9.6 CHAPTER SUMMARY195
Chapter Quiz196
Key Words and Phrases196
Useful Web Addresses196
10 WEB SERVICES, FEEDS AND BLOGS197
10.1 THE NEED FOR WEB SERVICES198
10.2 SOAP198
10.3 SOAP, XML AND HTTP198
Figure 10-1 SOAP communication199
Listing 10-1 A SOAP request200
Checkpoint!200
Listing 10-2 A SOAP response201
10.4 WEB FEEDS201
10.4.1 Reading a Web Feed202
Listing 10-3 An RSS Feed203
Listing 10-4 A weather RSS feed205
10.4.2 Making Your Own RSS Feeds205
Listing 10-5 RSS feed: individual parts205
Table 10-1 RSS <channel> elements207
Table 10-2 RSS <item> elements208
Checkpoint!208
Test Yourself!208
10.5 BLOGS209
Checkpoint!210
Test Yourself!210
10.6 CHAPTER SUMMARY210
Chapter Quiz211
Key Words and Phrases211
Useful Web Addresses212
11 THE SERVER SIDE213
11.1 WHAT IS A SERVER?214
Figure 11-1 Client and (Web) server model215
11.2 CHOICES215
11.2.1 Apache HTTPd Server216
11.2.2 Internet Information Services216
11.2.3 PHP, Perl, Python ...217
11.2.4 MySQL217
Checkpoint!217
11.3 SETTING UP217
11.3.1 XAMPP218
11.3.2 Where Is the Server?219
11.3.3 Testing219
Figure 11-2 Network details using ifconfig220
Table 11-1 Directory for XAMPP221
11.3.4 External Access to the Web Server221
Checkpoint!222
11.4 UNIX AND LINUX WEB SERVERS222
Figure 11-3 An Apache server test page223
Test Yourself!224
11.5 WHICH OS?224
Resources!225
11.6 LOGGING USERS225
Figure 11-4 Server logs226
11.7 DYNAMIC IPS226
Checkpoint!227
11.8 CHAPTER SUMMARY227
Chapter Quiz228
Key Words and Phrases228
Useful Web Addresses228
12 PHP 1: STARTING TO SCRIPT ON THE SERVER SIDE231
Test Yourself!232
12.1 STARTING TO SCRIPT WITH PHP232
Listing 12-1 Script using the date function232
Listing 12-2 Tidying the script using the date function233
12.1.1 Good Programing Practices Apply Here!233
Listing 12-3 Using concatenation234
Test Yourself!234
12.2 VARIABLES235
Listing 12-4 Utilizing variables and output235
12.2.1 Errors in PHP236
Figure 12-1 Error in variable name236
Figure 12-2 Error in variable at print out236
Checkpoint!237
Test Yourself!237
12.3 GETTING SOME INPUT237
Listing 12-5 Setting up a form238
Listing 12-6 Accessing the form variables238
Checkpoint!239
Test Yourself!239
12.4 DECISIONS240
Listing 12-7 Controlling execution flow240
Table 12-1 Comparison operators241
Listing 12-8 Using the switch-case structure242
Listing 12-9 Script using the date function243
12.5 LOOPING243
12.5.1 The for Loop244
Listing 12-10 Introducing the for loop244
12.5.2 The While Loop245
Listing 12-11 Script using while245
Listing 12-12 Yet another loop structure246
12.5.3 Using Break and Continue246
Listing 12-13 Skipping an iteration247
Checkpoint!247
12.6 CHAPTER SUMMARY248
Chapter Quiz248
Key Words and Phrases248
Useful Web Addresses249
13 PHP 2: ARRAYS, FUNCTIONS AND FORMS251
13.1 ARRAYS252
Listing 13-1 Using an array252
13.1.1 Arrays and Loops253
Listing 13-2 The foreach loop253
Listing 13-3 An equivalent for loop254
13.1.2 Keys and Values255
Listing 13-4 Using an associative array256
13.1.3 Forms and Associative Arrays256
Listing 13-5 HTML input form for PHP processing256
Listing 13-6 PHP to process the HTML form257
Checkpoint!258
Test Yourself!259
13.2 FUNCTIONS259
13.3 BROWSER CONTROL260
13.4 BROWSER DETECTION260
13.5 STRING MANIPULATION WITH PHP261
Tabel 13-1 Some string functions in PHP263
Checkpoint!264
13.6 FILES264
13.7 PASSWORDS265
13.8 EMAIL266
13.9 UPLOADING267
Checkpoint!269
Test Yourself!269
13.10 CHAPTER SUMMARY270
Chapter Quiz270
Key Words and Phrases270
Useful Web Addresses271
14 MORE ADVANCED PHP273
14.1 FURTHER FILE HANDLING274
14.1.1 Building a Visitor Log276
Test Yourself!276
Checkpoint!276
14.2 COOKIES277
Table 14-1 Cookies with PHP278
Listing 14-1 Using cookies for passwords279
Listing 14-2 Checking the cookie password280
14.3 SESSIONS280
Listing 14-3 Starting a session282
Listing 14-4 Session continuation [1]282
Listing 14-5 Sessions with visit count [2]283
Test Yourself!284
Checkpoint!284
14.4 MOBILE TECHNOLOGIES284
14.4.1 Browser Check285
14.4.2 WAP and WML286
Listing 14-6 A simple WML script286
14.4.3 PHP, WAP and WML287
Listing 14-7 Using PHP and WML together287
14.5 OTHER ADVANCED PHP FEATURES287
14.6 OBJECT-ORIENTED PROGRAMING288
14.6.1 What Is an Object?288
Encapsulation288
Polymorphism288
Inheritance288
Listing 14-8 OO PHP 4 with constructor289
Listing 14-9 OO PHP 5 with constructor290
Listing 14-10 Access Methods290
14.6.2 Inheritance291
Listing 14-11 Inheritance using OO PHP292
Test Yourself!293
Checkpoint!293
14.7 CHAPTER SUMMARY294
Chapter Quiz295
Key Words and Phrases295
Useful Web Addresses295
15 NETWORK AND WEB SECURITY297
15.1 INTRODUCTION298
15.2 HOW HACKING BEGAN298
15.3 WHO IS HACKING NOW?299
15.3.1 Motivations299
Checkpoint!300
15.4 TYPES OF ATTACK AND INTRUSION300
15.4.1 Denial of Service (DoS)300
15.4.2 Cross Site Scripting (XSS)301
15.4.3 Spam301
15.4.4 Email Bomb302
15.4.5 Spoofing302
15.4.6 Phishing302
15.4.7 CGI Insecurities302
15.4.8 Session Hijacking303
15.4.9 Key Logging303
15.4.10 Identity Theft and Stalking303
15.4.11 Trojan horse304
15.4.12 Social Engineering305
15.4.13 Spyware/Malware/Adware and Popups305
15.4.14 Viruses and Worms305
Checkpoint!307
Table 15-1 A history of computer viruses308
15.5 FIREWALLS309
15.6 PASSWORDS310
15.6.1 Password Policy311
15.7 DEFENSE!311
Checkpoint!312
15.8 CHAPTER SUMMARY312
Chapter Quiz312
Key Words and Phrases313
Useful Web Addresses313
16 DATABASES315
16.1 INTRODUCTION316
Figure 16-1 Communications with a DBMS316
16.2 RELATIONAL DATABASES317
Table 16-1 A database table317
Table 16-2 Parts of a database table318
Table 16-3 The book table318
Table 16-4 The borrows table319
16.2.1 Design and Modeling319
Figure 16-2 An entity-relationship diagram319
16.2.2 What is Normalization?320
Checkpoint!321
Test Yourself!322
16.3 SQL322
16.3.1 MySQL322
16.3.2 Starting, Stopping and Checking MySQL Server323
16.3.3 The MySQL Monitor323
Figure 16-3 The MySQL monitor324
16.4 BASIC COMMANDS WITH PHP EXAMPLES325
16.4.1 Connection to the Server325
16.4.2 Creating a Database325
16.4.3 Selecting a Database326
16.4.4 Listing Databases326
16.4.5 Listing Table Names326
16.4.6 Creating a Database Table327
16.4.7 Inserting Data327
Table 16-5 Data types in MySQL328
16.4.8 Altering Tables329
16.4.9 Queries329
16.4.10 Deleting Databases330
16.4.11 Deleting Data and Tables330
Checkpoint!330
16.5 PHPMYADMIN331
Figure 16-4 phpMyAdmin initial screen331
Figure 16-5 phpMyAdmin runtime information332
Figure 16-6 phpMyAdmin creating a table332
Figure 16-7 phpMyAdmin after table creation333
Figure 16-8 phpMyAdmin insert data333
16.6 DATABASE BUGS334
16.7 EXAMPLES334
Listing 16-1 HTML form for login335
Listing 16-2 Script to process login details336
Checkpoint!336
Test Yourself!337
16.8 CHAPTER SUMMARY337
Chapter Quiz338
Key Words and Phrases338
Useful Web Addresses338
17 ALTERNTIVE SCRIPTING LANGUAGES339
17.1 LEGACY CODE AND APPLICATION DEVELOPMENT CHOICES340
17.1.1 CGI340
17.1.2 Perl340
17.1.3 ASP341
Listing 17-1 Simple Hello World! script for ASP341
Listing 17-2 Using VBScript built-in functions for ASP341
Listing 17-3 Using the built-in Request and Response objects343
Listing 17-4 Collecting and using information from a form using GET344
Listing 17-5 Collecting and using information from a form using POST344
Listing 17-6 Using HTML radio buttons with ASP345
Listing 17-7 Using redirection in ASP346
Listing 17-8 Random redirection347
Listing 17-9 Finding the amount of data passed through a form347
Listing 17-10 Using cookies with ASP348
Checkpoint!349
Test Yourself!349
17.1.4 Java349
Listing 17-11 A first Java program350
Listing 17-12 A simple Java applet351
Listing 17-13 An HTML page for embedding the applet351
17.1.5 JSP352
17.1.6 The .NET Framework352
17.1.7 C#353
Listing 17-14 C# Hello World! program353
Listing 17-15 Simple Web Service Implementation354
17.1.8 Mono354
17.1.9 IKVM355
Checkpoint!355
Test Yourself!355
17.2 CHAPTER SUMMARY356
Chapter Quiz356
Key Words and Phrases356
Useful Web Addresses356
18 FUTURE: GAINING A PERSPECTIVE357
18.1 INTRODUCTION358
Figure 18-1 Graph showing WWW growth358
18.2 LOOKING BACK: TIMELINE359
Checkpoint!361
Test Yourself!362
18.3 LOOKING FORWARD: THEMES FOR THE FUTURE362
18.3.1 Speed362
18.3.2 Universal Access362
18.3.3 Autonomic and Adaptable Systems363
18.3.4 Unwired363
18.3.5 Computers in Disguise?363
18.3.6 Biological and Medical364
18.3.7 Convergence364
18.3.8 Multimedia365
18.3.9 Military365
Checkpoint!366
Test Yourself!366
18.4 CHAPTER SUMMARY366
Chapter Quiz367
Key Words and Phrases367
Useful Web Addresses368
Back Matter369
Glossary369
Sources379

Book details

Vendor Wiley Global Education UK
SKU 9780470017197R180
ISBN-13 9780470726112
Author Ralph Moseley
Edition 1st
Category Computers
Subject Site Design

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Building applications for the Internet is a complex and fast-moving field which utilizes a variety of continually evolving technologies. Whether your perspective is from the client or server side, there are many languages to master – X(HTML), JavaScript, PHP, XML and CSS to name but a few. These languages have to work together cleanly, logically and in harmony with the systems they run on, and be compatible with any browsers with which they interact.

Developing Web Applications presents script writing and good programming practice but also allows students to see how the individual technologies fit together. It includes recent technical developments to provide a practical and modern introduction to building web applications.

Assuming no prior programming experience, this concise, accessible book ensures that essential concepts on the client side are quickly grasped, and goes on to examine the server environment and available languages, including discussion of dynamic, modern scripting languages such as PHP. Network and security issues are also discussed. The aim of this book is to deliver exactly what is needed to start producing working applications as soon as possible – and have fun along the way.

Ideal for course use or self-study, this book includes practical suggestions for mini-projects which encourage the reader to explore his or her own imaginative solutions, as well as more theoretical end-of-chapter questions. It can also easily be used as a reference work as each section is self-contained, amplifying the key aspects of its particular topic. Most software covered is freely available in the public domain and no particular development environments are required. It is a direct, contemporary and extremely useful resource for anyone interested in learning how to program applications for the World Wide Web.

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