function getOS() {
	var UA  = navigator.userAgent.toUpperCase();
	if (UA.indexOf("MAC") >= 0) return "MacOS";
	if (UA.indexOf("WIN") >= 0) return "Windows";
	return "";
}
function getBrName() {
	var AN  = navigator.appName.toUpperCase();
	if (AN.indexOf("NETSCAPE") >= 0)  return "Netscape";
	if (AN.indexOf("MICROSOFT") >= 0) return "Explorer";
	return "";
}
function getBrVer() {
	var browser = getBrName();
	var version = 0;
	var s = 0;
	var e = 0;
	var 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;
}

/* Call CSS File */
os = getOS();
browser = getBrName();
version = getBrVer();
if (os == "MacOS") dirName = "m_";
if (os == "Windows") dirName = "w_";
if (browser == "Netscape") dirName += "nn";
if (browser == "Explorer") dirName += "ie";
if ((version >= 4) && (version < 5))   dirName += "4.css";
if ((version >= 5) && (version < 5.5)) dirName += "5.css";
if ((version >= 5.5) && (version < 6)) dirName += "5.5.css";
if ((version >= 6) && (version < 7))   dirName += "6.css";

if(navigator.appVersion >= "4")
	{
		document.write("<LINK rel='stylesheet' href='css/"+dirName+"' type='text/css'>");
	}