Moving bouders left two squares
Deleting a field
Adding unfinished prototype
Putting a game into a document
Replacing of keyDown method and adding a dictionary
Stopping the event for key presses after handlig them
Adding setInterval to handle the timing of the animation
Adding focus and blur event types
Adding change event type related to form inputs
Creating a bit of un-collected memory
Adding function addAlerter used in keeping references with handlers
Writing handler
Adding a simple test
Merge branch 'chapter13'
Resolving confict