Sams Teach Yourself HTML 4 in 24 Hours

By Dick Oliver

• Table of Contents
  • Copyright
  • About the Author
  • Acknowledgments
  • Tell Us What You Think!
  • Put Your HTML Page Online Today
  • I. Your First Web Page
  • Hour 1. Understanding HTML and XML
  • Hour 2. Create a Web Page Right Now
  • Hour 3. Linking to Other Web Pages
  • Hour 4. Publishing Your HTML Pages
  • II. Web Page Text
  • Hour 5. Text Alignment and Lists
  • Hour 6. Text Formatting and Font Control
  • Hour 7. Email Links and Links Within a Page
  • Hour 8. Creating HTML Forms
  • III. Web Page Graphics
  • Hour 9. Creating Your Own Web Page Graphics
  • Hour 10. Putting Graphics on a Web Page
  • Hour 11. Custom Backgrounds and Colors
  • Hour 12. Creating Animated Graphics
  • IV. Web Page Design
  • Hour 13. Page Design and Layout
  • Hour 14. Graphical Links and Imagemaps
    • How and Why to Avoid Using Imagemaps
    • Mapping Regions Within an Image
    • Client-Side Imagemaps
    • Server-Side Imagemaps
    • Combined Client/Server Imagemaps
    • Summary
    • Q&A
    • Workshop
  • Hour 15. Advanced Layout with Tables
  • Hour 16. Using Style Sheets
  • V. Dynamic Web Pages
  • Hour 17. Embedding Multimedia in Web Pages
  • Hour 18. Interactive Pages with Applets and ActiveX
  • Hour 19. Web Page Scripting for Non-Programmers
  • Hour 20. Setting Pages in Motion with Dynamic HTML
  • VI. Building a Web Site
  • Hour 21. Multipage Layout with Frames
  • Hour 22. Organizing and Managing a Web Site
  • Hour 23. Helping People Find Your Web Pages
  • Hour 24. Planning for the Future of HTML
  • VII. Appendixes
  • A. Readers' Most Frequently Asked Questions
  • B. HTML Learning Resources on the Internet
  • C. Complete HTML 4 Quick Reference
  • D. HTML Character Entities

Combined Client/Server Imagemaps

There is a way for you to provide client-side imagemaps that automatically switch to server-side imagemaps if the user's browser doesn't support client-side maps. With a single line of code, you can allow an imagemap to be interpreted either by the end user's software or by the server by including the ismap attribute in the <img /> tag, and then including both a usemap= attribute and cgi-bin/imagemap reference.

<map "#thisthat">
<area shape="rect" coords="0,0,102,99" href="this.htm" />
<area shape="rect" coords="103,0,205,99" href="that.htm" /></map>
<a href="/cgi-bin/imagemap/thisthat">
<img src="thisthat.gif" usemap="#thisthat" ismap /></a>

Here, as with any unrecognized tag, browsers that don't support client-side imagemaps will simply ignore the <usemap> and <ismap> tags and treat the preceding code like an old-fashioned server-side imagemap.

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