var brand = "not netscape";
var os = "not mac";
var version;

if ( navigator.appName ) {
  if (navigator.appName.indexOf("Netscape") != -1) { 
    brand = "netscape";
  }
}

if ( navigator.platform ) {
  if (navigator.platform.indexOf("Mac") != -1) { 
    os = "mac";
  }
}

if (navigator.appVersion) { 
  version = parseInt(navigator.appVersion);
}

if ( brand == 'netscape' && os == 'mac' && version == 4 ) {
  document.write("<link rel='stylesheet' type='text/css' href='/css/fte-article-mac.css'>");
}

if ( brand == 'netscape' && os == 'not mac' && version == 4 ) {
  document.write("<link rel='stylesheet' type='text/css' href='/css/fte-article-pc.css'>");
}