Client-side JavaScript is a scripting language that you can use to turn static HTML pages into dynamic, interactive web pages. Not only can JavaScript jazz up your web pages by providing function that HTML can't, it can ease the burden on your server-side applications (such as CGI programs) by validating form input and adding dynamic function at the browser level.

In this session you will learn:
1. What JavaScript is and what it can do.
2. Why JavaScript is a powerful tool for web development.
3. How JavaScript is used in web pages (with code examples), including:
- Form validation
- Page redirection
- Opening windows
- Writing to the browser
- Image swapping

Prerequisite: Experience with HTML forms. Knowledge of web programming is helpful, but not required.