function detectBrowser()
{
var browser=navigator.appName;
var b_version=navigator.appVersion;
var version=parseFloat(b_version);
if ((browser=="Microsoft Internet Explorer") && (version<7))
  {
  return(true);
  }
}

function detectbrowser2()
{
if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)){ //test for MSIE x.x;
 var ieversion=new Number(RegExp.$1) // capture x.x portion and store as a number
 if (ieversion==6)
  alert("Your browser is Internet Explorer version 6 or less." + '\n' + "The drop-down menus on this website will not operate when viewed with this browser." + '\n' + '\n' + "Please upgrade to Internet Explorer version 7 or later." + '\n' + "The upgrade is free at http://update.microsoft.com ");
 else if (ieversion==5.5)
  alert("Your browser is Internet Explorer version 6 or less." + '\n' + "The drop-down menus on this website will not operate when viewed with this browser." + '\n' + '\n' + "Please upgrade to Internet Explorer version 7 or later." + '\n' + "The upgrade is free at http://update.microsoft.com ");
 else if (ieversion==5)
  alert("Your browser is Internet Explorer version 6 or less." + '\n' + "The drop-down menus on this website will not operate when viewed with this browser." + '\n' + '\n' + "Please upgrade to Internet Explorer version 7 or later." + '\n' + "The upgrade is free at http://update.microsoft.com ");
}
}

function detectBrowser3()
{
var browser=navigator.appName;
var b_version=navigator.appVersion;
var version=parseFloat(b_version);
if ((browser=="Microsoft Internet Explorer") && (version<7))
  {
  alert("Browser=" + browser)
  alert("Version=" + version)
  alert("Your browser is Internet Explorer version 6 or less. The drop-down menues on this website will not operate when viewed with this browser. Please upgrade to IE7 or later. It is a free upgrade at http://update.microsoft.com ");
  }
}