//   Internet Explorer -> Explorer
//   Netscape Navigator -> Netscape

function getBrowserName(){
	aName = navigator.appName.toUpperCase();
	if (aName.indexOf("MICROSOFT") >= 0) return "Explorer";
	if (aName.indexOf("NETSCAPE") >= 0) return "Netscape";
	return;
}

//   ブラウザバージョン取得
function getBrowserVersion(){
	browser = getBrowserName();
	version = 0;
	s = 0;
	e = 0;
	appVer = navigator.appVersion;

	if (browser == "Netscape"){
		s = appVer.indexOf(" ",0);
		version = eval(appVer.substring(0,s));
		if (version >= 5) version++;
	}

	if (browser == "Explorer"){
		appVer = navigator.userAgent;
		s = appVer.indexOf("MSIE",0) +5;
		e = appVer.indexOf(";",s);
		version = eval(appVer.substring(s,e));
	}

	return version;
}

//   Windows95/98/NT/2000/   -> Windows
//   Machintosh   -> Mac
function getOSType(){
	uAgent = navigator.userAgent.toUpperCase();
	if (uAgent.indexOf("WIN") >= 0) return "Windows";
	if (uAgent.indexOf("MAC") >= 0) return "MacOS";
	return "Uknown";
}