//Macintosh									-> Mac
//Windows95/98/NT/2000/XP		-> Win
//UNIX											-> UNIX
function getOSType(){
	var uAgent  = navigator.userAgent.toUpperCase();
	if (uAgent.indexOf("MAC") >= 0) agent="Mac";
	if (uAgent.indexOf("WIN") >= 0) agent="Win";
	if (uAgent.indexOf("X11") >= 0) agent="UNIX";
	return agent;
}


//Netscape Navigator	-> NN
//Internet Explorer		-> IE
//Safari							-> Safari
//Opera								-> Opera
function getBrowserName(){
	var aName  = navigator.appName.toUpperCase();
	var uName = navigator.userAgent.toUpperCase();
	if (uName.indexOf("SAFARI") >= 0)  bname="Safari";
	if (uName.indexOf("OPERA") >= 0)  bname="Opera";
	if (aName.indexOf("NETSCAPE") >= 0)  bname="NN";
	if (aName.indexOf("MICROSOFT") >= 0) bname="IE";
	return bname;
}

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"){
		version = eval(appVer.substring(0,3)) - 4;
	}
	
	if (browser == "Opera"){
		s = uName.indexOf("OPERA ",0) + 6;
		e = uName.indexOf(" ",s);
		version = eval(uName.substring(s,e));
	}
	
	if (browser == "NN"){
		s = appVer.indexOf(" ",0);
		version = eval(appVer.substring(0,s));
		if (version >= 5) version++;
	}
	
	if (browser == "IE"){
		s = appVer.indexOf("MSIE ",0) + 5;
		e = appVer.indexOf(";",s);
		version = eval(appVer.substring(s,e));
	}
	return version;
}