var browser=navigator.appName;
var b_version=navigator.appVersion;
var version=parseFloat(b_version);

if (browser == "Microsoft Internet Explorer")
{
  document.write("<p>Your web browser is too bad and insecure... please use another like <a href='http://www.firefox.com'>Mozilla Firefox</a> or <a href='http://www.opera.com'>Opera</a><p>'");
}
//document.write("Browser name: "+ browser);
//document.write("<br />");
//document.write("Browser version: "+ version);