Amazing™ Active Keyboard Listener "great for games!"

AmazingKeyboardListener.js

// (raf shim by Paul Irish)
window.requestAnimationFrame = (function(){
  return  window.requestAnimationFrame       ||
          window.webkitRequestAnimationFrame ||
          window.mozRequestAnimationFrame    ||
          function( callback ){
            window.setTimeout(callback, 1000 / 60);
          };
})();

function detectKeys(){
	if(keys[37] == true){
		//left arrow stuffs
	}
	if (keys[39] == true){
      		//right arrow stuffs
	}
	if(keys[38] == true){
		//up arrow stuffs
	}
	requestAnimationFrame(detectKeys);
}


var keys = [];
detectKeys();

window.addEventListener('keydown', function (e) {
  keys[e.keyCode] = true;
}, false);
window.addEventListener('keyup', function (e) {
	keys[e.keyCode] = false;
}, false);