Debugging with Firebug: Modern JavaScript: Develop and Design video

In a separate video, the author explains the basics of debugging using Java Script alone. In time, however, you'll be able to debug problems more quickly by using an excellent debugging tool such as Firebug, the original Java Script debugger. This video introduces the core Firebug features and specifically demonstrates how to use them to debug problematic code. These are concepts author Larry Ullman covers in Chapter 3 of his book Modern Java Script: Develop and Design (ISBN: 0321812522).