// begin: browser detection
var thisBrowser = null;
var bName = navigator.appName;
var bVer = parseInt(navigator.appVersion);

if ((bName == "Netscape") && (bVer <= 4))
  thisBrowser = "ns4";
else
  thisBrowser = "ie";

// write the css
switch(thisBrowser)
{
  case "ns4":
    document.writeln("<link href='css/ns.css' rel='stylesheet' type='text/css'>");
    break;
  default:
    document.writeln("<link href='css/ie.css' rel='stylesheet' type='text/css'>");
    break;
}
// end