function getBrowserName()
{
var aName  = navigator.appName.toUpperCase();
if (aName.indexOf("NETSCAPE") >= 0)  return "Netscape";
if (aName.indexOf("MICROSOFT") >= 0) return "Explorer";
return "";
}

function getOS()
{
var uAgent  = navigator.userAgent.toUpperCase();
if (uAgent.indexOf("MAC") >= 0) return "MacOS";
if (uAgent.indexOf("WIN") >= 0) return "Windows";
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);
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;
}

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

if (browser == "Explorer"){
document.writeln('<link rel="stylesheet" href="css/ie.css" type="text/css">');
}

if ((os == "MacOS")&&(browser == "Netscape")&&(version >= 4) && (version <5)){
document.writeln('<link rel="stylesheet" href="css/mac_ns4.css" type="text/css">');
}

if ((os == "Windows")&&(browser == "Netscape")&&(version >= 4) && (version <5)){
document.writeln('<link rel="stylesheet" href="css/win_ns4.css" type="text/css">');
}

if ((browser == "Netscape")&&(version >= 6)){
document.writeln('<link rel="stylesheet" href="css/ie.css" type="text/css">');
}

if((browser != "Explorer")&&(browser != "Netscape")){
document.writeln('<link rel="stylesheet" href="css/ie.css" type="text/css">');
}