Fiddle with Firebug

For light javascript programming/testing, JSFiddle is a good online tool.  It can be used with firebug also.

1. Go to http://jsfiddle.com
2. Add "https://getfirebug.com/firebug-lite-debug.js" to External Resources

 Or, use this link -- FireBug is already added, http://jsfiddle.net/keithkim/m0e8515u/