閲覧中のブラウザの種類とバージョンを表示する

MSIE、Chrome、Safari等のブラウザで以下のJavascriptを表示すると、画面にブラウザの種類とバー上を表示します。

<meta http-equiv="Content-Type" content="text/html; charset=Shift_JIS" />
<meta http-equiv="Content-Style-Type" content="text/css" />

<script type="text/javascript" language="JavaScript">// <![CDATA[
myAgent = ""; function myGetVer( myKey ){   myStart = myAgent.indexOf( myKey ) + myKey.length;   myEnd = myAgent.indexOf( ";", myStart );   return "Ver." + myAgent.substring ( myStart, myEnd ); } function mySearch( myKey ){   return (myAgent.indexOf( myKey )>=0) ? true : false;
}

function myFunc( myUserAgent ){
  myAgent = myUserAgent + ";";
  myAgent = myAgent.replace( / /g, ";" );

  // Opera/9.80 (Windows NT 6.1; WOW64) Presto/2.12.388 Version/12.14
  if ( mySearch( "Opera/" ) ) myVer = "Opera " + myGetVer( "Opera/" );

  // Mozilla/5.0 (Windows NT 6.0; rv:19.0) Gecko/20100101 Firefox/19.0
  else if ( mySearch( "Firefox" ) ) myVer = "Firefox " + myGetVer( "Firefox/" );

  // Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_2) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.99 Safari/537.22
  else if ( mySearch( "Chrome" ) ) myVer = "Google Chrome " + myGetVer( "Chrome/" );

  // Mozilla/5.0 (Linux; U; Android 4.1.2; ja-jp; F-02E Build/V16R46A) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30
  // Mozilla/5.0 (iPhone; CPU iPhone OS 6_1_3 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10B329 Safari/8536.25
  else if ( mySearch( "Mobile" ) && mySearch( "Safari" ) && mySearch( "Version" ) ) myVer = "Mobile Safari " + myGetVer( "Version/" );

  // Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_3) AppleWebKit/536.28.10 (KHTML, like Gecko) Version/6.0.3 Safari/536.28.10
  else if ( mySearch( "Safari" ) && mySearch( "Version" ) ) myVer = "Safari " + myGetVer( "Version/" );

  // Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0; Touch; MAFSJS)
  else if ( mySearch( "MSIE;" ) ) myVer = "Internet Explorer " + myGetVer( "MSIE;" );

  else myVer = navigator.appName;
  return myVer;
}

myParam = navigator.userAgent;
document.write( "あなたのブラウザは、" , myFunc( myParam ) , " です" );
// ]]></script>

MSIEの場合

Google Chromeの場合

Safariの場合