This eclipse is configured to run JS test automatically on each save. Curently
the location of java is set to /usr/bin/java which should work on Linux and
MacIntosh computers. On windows you will have set the path to your java location
before Eclipse will run your files automatically.

Changing the location of 'java':
  1. From menu select 'Project' than 'Properties'
  2. On the right hand side of the pop up select 'Builders'
  3. After selecting 'js-test-driver' builder click 'Edit...' button.
  4. Change the location of the 'java' executable to your location.