function getOSType()
{
    var uAgent  = navigator.userAgent.toUpperCase();
    if (uAgent.indexOf("MAC") >= 0) return "MacOS";
    if (uAgent.indexOf("WIN") >= 0) return "Windows";
    return "";
}
function getBrowserName()
{
    var aName  = navigator.appName.toUpperCase();
    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;
	if (browser == "Netscape")
	{
		s = appVer.indexOf(" ",0);
		if(!isNaN(appVer.substring(0,s))){
			version = eval(appVer.substring(0,s));
			if ((version >= 5) && !isNaN(version)){
				 version++;
			}
		}
		else{
			version = appVer.substring(0,s);
		}
	}
	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 setCSS(theURL){
	os      = getOSType();
	browser = getBrowserName();
	version = getBrowserVersion();

	dirName = theURL;
	if (os == "MacOS")   dirName += "mac/";
	if (os == "Windows") dirName += "win/";
	if (browser == "Netscape") dirName += "nn";
	if (browser == "Explorer") dirName += "ie";
	if ((version >= 3) && (version < 4.5))  dirName += "4.css";
	if ((version >= 4.5) && (version < 5))  dirName += "4.5.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 (version == "4.01a")  dirName += "4.css";
	document.write("<link rel='stylesheet' href='"+dirName+"' type='text/css'>");
}