window.onload = function() {
	UP = 38
	RIGHT = 39
	DOWN = 40
	LEFT = 37
	document.onkeydown = keydown
	document.onkeyup = keyup
	keys = []
}

function getkeycode(e) {
  var keycode
  if (window.event) keycode = window.event.keyCode
  else if (e) keycode = e.which
  else keycode = 0
  return keycode
}

function keydown(e) {
	var keycode = getkeycode(e)
	keys[keycode] = true
	document.title = keycode
}

function keyup(e) {
	var keycode = getkeycode(e)
	keys[keycode] = true
}