function CheckBrowser() {
  var agent = navigator.userAgent;
  var name = navigator.appName;
  var version = navigator.appVersion;
  browser1 = (name == "Netscape" && agent.indexOf("Opera") == -1);
  browser2 = (name == "Microsoft Internet Explorer" && agent.indexOf("Opera") == -1);
  browser3 = (agent.indexOf("Opera") != -1);
  if (browser1) {
     return (name + ' ' + navigator.appCodeName + '/ '+version+' <img src=\"/gif/netscape.gif\">');
  } else if (browser2) {
     return (name + ' ' + navigator.appCodeName + '/ '+version+' <img src=\"/gif/msie.gif\">');
  } else if (browser3) {
     return ('Opera '+agent.substring((agent.indexOf("Opera")+5),agent.length)+'<img src=\"/gif/opera.gif\" align=middle>');
  } else {
     return (name + ' ' + navigator.appCodeName + '/ '+version);
  }
}