One of the most important XHTML features is the hyperlink, which references (or links to) other resources, such as XHTML documents and images. In XHTML, both text and images can act as hyperlinks. Web browsers typically underline text hyperlinks and color their text blue by default, so that users can distinguish hyperlinks from plain text. In Fig. F.5, we create text hyperlinks to four different Web sites.
Figure F.5. Linking to other Web pages.
Line 17 introduces the strong element. Browsers typically display such text in a bold font. Links are created using the a (anchor) element. Line 20 defines a hyperlink that links the text Deitel to the URL assigned to attribute HRef, which specifies the location of a linked resource, such as a Web page, a file or an e-mail address. This particular anchor element links to a Web page located at http://www.deitel.com. When a URL does not indicate a specific document on the Web site, the Web server returns a default Web page. This page is often called index.html; however, most Web servers can be configured to use any file as the default Web page for the site. (Open http://www.deitel.com in one browser window and http://www.deitel.com/index.html in a second browser window to confirm that they are identical.) If the Web server cannot locate a requested document, it returns an error indication to the Web browser, and the browser displays a Web page containing an error message to the user.
Anchors can link to e-mail addresses using a mailto: URL. When someone clicks this type of anchored link, most browsers launch the default e-mail program (e.g., Outlook Express) to enable the user to write an e-mail message to the linked address. Figure F.6 demonstrates this type of anchor. Lines 1719 contain an e-mail link. The form of an email anchor is <a href="mailto:</tt><span>emailaddress</span><tt>">...</a>. In this case, we link to the e-mail address deitel@deitel.com.
Figure F.6. Linking to an e-mail address.
1 "1.0"?> 2 "-//W3C//DTD XHTML 1.1//EN" 3 "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> 4 5 6 7 8 |
"http://www.w3.org/1999/xhtml"> 9 | 10 | Internet and WWW How to Program - Contact Page 11 12 13 | 14 15
16 My e-mail address is 17 <a href="</span"> "mailto:deitel@deitel.com"></a><a href="</span"> 18 deitel@deitel.com 19 </a> 20 . Click the address and your browser will 21 open an e-mail message and address it to me. 22 23 24 |
F 7 Images |
Preface
Index
Introduction to Computers, the Internet and Visual C#
Introduction to the Visual C# 2005 Express Edition IDE
Introduction to C# Applications
Introduction to Classes and Objects
Control Statements: Part 1
Control Statements: Part 2
Methods: A Deeper Look
Arrays
Classes and Objects: A Deeper Look
Object-Oriented Programming: Inheritance
Polymorphism, Interfaces & Operator Overloading
Exception Handling
Graphical User Interface Concepts: Part 1
Graphical User Interface Concepts: Part 2
Multithreading
Strings, Characters and Regular Expressions
Graphics and Multimedia
Files and Streams
Extensible Markup Language (XML)
Database, SQL and ADO.NET
ASP.NET 2.0, Web Forms and Web Controls
Web Services
Networking: Streams-Based Sockets and Datagrams
Searching and Sorting
Data Structures
Generics
Collections
Appendix A. Operator Precedence Chart
Appendix B. Number Systems
Appendix C. Using the Visual Studio 2005 Debugger
Appendix D. ASCII Character Set
Appendix E. Unicode®
Appendix F. Introduction to XHTML: Part 1
Appendix G. Introduction to XHTML: Part 2
Appendix H. HTML/XHTML Special Characters
Appendix I. HTML/XHTML Colors
Appendix J. ATM Case Study Code
Appendix K. UML 2: Additional Diagram Types
Appendix L. Simple Types
Index