// 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 <= 499)) version = 2;
		if (version >= 500) version = 3;
	}
	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;
}