<!-- Begin browser detection -->
    var useragent = navigator.userAgent;
    var bName = (useragent.indexOf('Opera') > -1) ? 'Opera' : navigator.appName;
    var pos = useragent.indexOf('MSIE');
    if (pos > -1) {
      bVer = useragent.substring(pos + 5);
      var pos = bVer.indexOf(';');
      var bVer = bVer.substring(0,pos);
    }
    var pos = useragent.indexOf('Opera');
    if (pos > -1)   {
      bVer = useragent.substring(pos + 6);
      var pos = bVer.indexOf(' ');
      var bVer = bVer.substring(0, pos);
    }
    if (bName == "Netscape") {
      var bVer = useragent.substring(8);
      var pos = bVer.indexOf(' ');
      var bVer = bVer.substring(0, pos);
    }
    if (bName == "Netscape" && parseInt(navigator.appVersion) >= 5) {
      var pos = useragent.lastIndexOf('/');
      var bVer = useragent.substring(pos + 1);
        }
    if (bName == "Netscape" && parseInt(navigator.appVersion) < 5) {
       alert("This web site will not display properly with your version of Netscape.\nYou need Netscape 6 or greater!!!\n");
        }

<!-- End browser detection -->