Sams Teach Yourself JavaScript in 24 Hours

By Michael Moncur

• Table of Contents
  • Copyright
  • About the Author
  • Acknowledgments
  • We Want to Hear from You!
  • Reader Services
  • Introduction
  • Part I: Getting Started
  • Hour 1. Understanding JavaScript
  • Hour 2. Creating a Simple Script
    • Tools for Scripting
    • What Time is It?
    • Beginning the Script
    • Adding JavaScript Statements
    • Creating Output
    • Adding the Script to a Web Page
    • Testing the Script
    • Workshop: Hiding Scripts from Older Browsers
    • Summary
    • Q&A
    • Quiz
    • Exercises
  • Hour 3. How JavaScript Programs Work
  • Part II: Learning JavaScript Basics
  • Hour 4. Using Functions and Variables
  • Hour 5. Using Strings and Arrays
  • Hour 6. Testing and Comparing Values
  • Hour 7. Repeating Yourself: Using Loops
  • Hour 8. Using Math and Date Functions
  • Part III: The Document Object Model (DOM)
  • Hour 9. Working with the Document Object Model
  • Hour 10. Responding to Events
  • Hour 11. Using Windows and Frames
  • Hour 12. Getting Data with Forms
  • Hour 13. Using Graphics and Animation
  • Part IV: Moving on to Advanced JavaScript Features
  • Hour 14. Creating Cross-Browser Scripts
  • Hour 15. Creating Custom Objects
  • Hour 16. Working with Sounds and Plug-Ins
  • Hour 17. Debugging JavaScript Applications
  • Part V: Working with Dynamic HTML (DHTML)
  • Hour 18. Working with Style Sheets
  • Hour 19. Using Dynamic HTML (DHTML)
  • Hour 20. Using Advanced DOM Features
  • Part VI: Putting It All Together
  • Hour 21. Improving a Web Page with JavaScript
  • Hour 22. Creating a JavaScript Game
  • Hour 23. Creating DHTML Applications
  • Hour 24. JavaScript Tips and Tricks
  • Part VII: Appendices
  • Appendix A. Other JavaScript Resources
  • Appendix B. Tools for JavaScript Developers
  • Appendix C. Glossary
  • Appendix D. JavaScript Quick Reference
  • Appendix E. DOM Quick Reference

Beginning the Script

Your script, like most JavaScript programs, begins with the HTML <script> tag. As you learned in Hour 1, you use the <script> and </script> tags to enclose a script within the HTML document.

To begin creating the script, open your favorite text editor and type the beginning and ending <script> tags, as shown below.

<script LANGUAGE="JavaScript" type="text/javascript">
</script>

Since this script does not use any of the new features of JavaScript 1.1 or later, you won't need to specify a version number in the <script> tag. This script should work in Netscape 2.0 and later or Internet Explorer 3.0 or later.

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