browser = navigator.appName;
ie = "Microsoft Internet Explorer";
netscape = "Netscape";
os = navigator.platform;
mac = "MacPPC";
if (os == mac) {
  if (browser == ie) {
    document.write('<link rel="stylesheet" type="text/css" href="css/macIE.css" title="master">');
  }
  else { /* default to netscape */
    document.write('<link rel="stylesheet" type="text/css" href="css/macNS.css" title="master">');
  }
}
else { /* default to Windows */
  if (browser == ie && os != mac) {
    document.write('<link rel="stylesheet" type="text/css" href="css/winIE.css" title="master">');
  }
  else {
    document.write('<link rel="stylesheet" type="text/css" href="css/winNS.css" title="master">');
  }
}