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// https://developers.google.com/web/updates/2011/10/Let-Your-Content-Do-the-Talking-Fullscreen-API
$( document ).ready(function() {
    enterFullscreen();
});

function onFullScreenEnter() {
  console.log("Entered fullscreen!");
  elem.onwebkitfullscreenchange = onFullScreenExit;
  elem.onmozfullscreenchange = onFullScreenExit;
};

// Called whenever the browser exits fullscreen.
function onFullScreenExit() {
  console.log("Exited fullscreen!");
};

function exitFullscreen() {
  console.log("exitFullscreen()");
  document.cancelFullScreen();
  document.getElementById('enter-exit-fs').onclick = enterFullscreen;
}

// Note: FF nightly needs about:config full-screen-api.enabled set to true.
function enterFullscreen() {
  var elem = document.querySelector(document.webkitExitFullscreen ? "#game" : "#game");
  console.log("enterFullscreen()");
  elem.onwebkitfullscreenchange = onFullScreenEnter;
  elem.onmozfullscreenchange = onFullScreenEnter;
  elem.onfullscreenchange = onFullScreenEnter;
  if (elem.webkitRequestFullscreen) {
    elem.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
  } else {
    if (elem.mozRequestFullScreen) {
      elem.mozRequestFullScreen();
    } else {
      elem.requestFullscreen();
    }
  }
  //document.getElementById('enter-exit-fs').onclick = exitFullscreen;
}