//　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 "";
}

//　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 (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")
	{
		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 == "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;
}

function loadCSS(rootPath){

    cssFile = rootPath;

    os      = getOSType();
    browser = getBrowserName();
    version = getBrowserVersion();

    if (os == "MacOS")         cssFile += "mac_";
    if (os == "Windows")       cssFile += "win_";
    if (os == "UNIX")          cssFile += "unix_";
    if (browser == "Netscape") cssFile += "nn";
    if (browser == "Explorer") cssFile += "ie";
    if (browser == "Safari")   cssFile += "saf";
    if (browser == "Opera")    cssFile += "op";
    if ((version >= 1) && (version < 2))   cssFile += "1.css";
    if ((version >= 2) && (version < 3))   cssFile += "2.css";
    if ((version >= 3) && (version < 4))   cssFile += "3.css";
    if ((version >= 4) && (version < 5))   cssFile += "4.css";
    if ((version >= 5) && (version < 5.5)) cssFile += "5.css";
    if ((version >= 5.5) && (version < 6)) cssFile += "5.5.css";
    if ((version >= 6) && (version < 7))   cssFile += "6.css";
    if ((version >= 7) && (version < 8))   cssFile += "7.css";

    var linkTag = '';

    if(cssFile !=''){
      linkTag ='<link rel="stylesheet" type="text/css" '
              + ' href="' + cssFile + '">';
    }

    document.write(linkTag)
}