//　Macintosh 　-> MacOS 
//　Windows95/98/NT/2000/XP ->　Windows 
//　UNIX ->　UNIX 
function getOSType() 
{ 
	var uAgent = navigator.userAgent.toUpperCase(); 
	if (uAgent.indexOf("MAC") >= 0) return "MacOS"; 
	if (uAgent.indexOf("WIN") >= 0) return "Windows"; 
	if (uAgent.indexOf("X11") >= 0) return "UNIX"; return ""; 
} 
//　Firefox -> Firefox 
//　Netscape Navigator -> Netscape 
//　Internet Explorer ->　Explorer 
//　Safari ->　Safari 
//　Opera ->　Opera 
function getBrowserName() 
{ 
	var aName = navigator.appName.toUpperCase(); 
	var uName = navigator.userAgent.toUpperCase(); 
	if (uName.indexOf("SAFARI") >= 0) return "Safari"; 
	if (uName.indexOf("OPERA") >= 0) return "Opera"; 
	if (uName.indexOf("FIREFOX") >= 0) return "Firefox"; 
	if (aName.indexOf("NETSCAPE") >= 0) return "Netscape"; 
	if (aName.indexOf("MICROSOFT") >= 0) return "Explorer"; 
	return ""; 
} 
function getBrowserVersion() 
{ 
	var browser = getBrowserName(); 
	var version = 0; 
	var s = 0; 
	var e = 0; 
	var appVer = navigator.appVersion; 
	var uName = navigator.userAgent.toUpperCase(); 
	if (browser == "Safari") 
	{ 
		s = uName.indexOf("SAFARI/",0); 
		version = (uName.substring(s+7,s+99)); 
		if (version < 400) version = 1; 
		if (version >= 400) version = 2; 
	} 
	if (browser == "Opera") 
	{ 
		s = uName.indexOf("OPERA",0) + 6; e = uName.indexOf(" ",s); 
		version = parseFloat(uName.substring(s,e));
	} 
	if (browser == "Firefox") 
	{ 
		s = uName.indexOf("FIREFOX/",0); 
		version = parseFloat(uName.substring(s+8,s+8+3));
	} 
	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; 
}