simple event handler to map keycodes of arrow keys to functions.

detect_arrow_keys.js

$(window).on('keyup', function (e) {
	switch (e.keyCode) {
		/*left*/
		case 37:
			console.log('left');
			break;
		/*right*/
		case 39:
			console.log('right');
			break;
		/*up*/
		case 38:
			console.log('up');
			break;
		/*down*/
		case 40:
			console.log('down');
			break;
		/*escape*/
		case 27:
			console.log('escape');
			break;
		/*enter*/
		case 13:
			console.log('enter');
			break;
	}
});