// Determine browser versions
opera = konq = ie4 = ns4 = ns6 = w3c = false;
browser = "";

if (navigator.userAgent.indexOf("Opera") > -1) {
  opera = true;
  w3c = true;
  browser = "opera";
}
else if (navigator.vendor && navigator.vendor.indexOf("KDE") > -1) {
  konq = true;
  w3c = true;
  browser = "konqueror";
}
else if(navigator.appName == "Microsoft Internet Explorer" && parseInt(navigator.appVersion) >= 4) {
  ie4 = true;
  browser = "Internet Explorer";
}
else if(navigator.appName == "Netscape" && parseInt(navigator.appVersion) >= 4 && parseInt(navigator.appVersion) < 5)  {
  ns4 = true;
  ie4 = false;
  browser = "Netscape 4";
}
else if(navigator.appName == "Netscape" && parseInt(navigator.appVersion) >= 5) {
  ns6 = true;
  w3c = true;
  ie4 = ns4 = false;
  browser = "Mozilla";
}
else {
  w3c = true;
  ie4 = ns4 = false;
  browser = "Unknown";
}
ie = ie4;