gistfile1.js

document.onkeyup = keyCheck;

function keyCheck(e)
{
	var keyId = (window.event) ? event.keyCode : e.keyCode; // get identifier of key pressed

	switch(keyId)
	{
		// space bar
		case 32:
		togglePlayback('song' + currentTrack);
		break;

		// left arrow
		case 37:
		previousSong();
		break;

		// right arrow
		case 39:
		nextSong();
		break;
	}
}