//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/Me/NT/2000 -> Windows
//Macintosh -> MacOS
//UNIX -> UNIX
function getOSType()
{
	uAgent=navigator.userAgent.toUpperCase();
	if(uAgent.indexOf("WIN")>=0) return "Windows";
	if(uAgent.indexOf("MAC")>=0) return "MacOS";
	if(uAgent.indexOf("X11")>=0) return "UNIX";
	return "不明"
}