Edit in JSFiddle

<div>あなたのUAとOSはたぶん：</div>

// view code name
var viewCodeName = function(codeName, fontSize) {
  if( !fontSize ) fontSize = 70;
  if( !codeName ) codeName = "名無し";
  var div = document.createElement("div");
  div.style.fontSize = fontSize + "px";
  div.style.fontFamily="Verdana,arial,sans-serif";
  var txt = document.createTextNode(codeName);
  div.appendChild(txt);
  document.body.appendChild(div);
}

// main
!function(moi){ 
  var ua = window.navigator.userAgent;
  var codeName = moi.judge(ua) || undefined;
  console.log(ua);
  console.log(codeName);
  viewCodeName(ua, 8);
  viewCodeName(codeName);
}(new MacOSIdentifier);