How to detect IE version using JavaScript

The following JavaScript is used to detect the Internet Explorer version 8, 7 or 6. It’s returned -1 if the browser is not Internet Explorer.

function getInternetExplorerVersion()
// Returns the version of Windows Internet Explorer or a -1
// (indicating the use of another browser).
   var rv = -1; // Return value assumes failure.
   if (navigator.appName == 'Microsoft Internet Explorer')
      var ua = navigator.userAgent;
      var re  = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
      if (re.exec(ua) != null)
         rv = parseFloat( RegExp.$1 );
   return rv;
function checkIEVersion()
   var msg = "You're not using Windows Internet Explorer.";
   var ver = getInternetExplorerVersion();
   if ( ver> -1 )
      if ( ver>= 8.0 )
         msg = "You're using Windows Internet Explorer 8.";
      else if ( ver == 7.0 )
    	  msg = "You're using Windows Internet Explorer 7.";
      else if ( ver == 6.0 )
    	  msg = "You're using Windows Internet Explorer 6.";
    	  msg = "You should upgrade your copy of Windows Internet Explorer";
   alert( msg );


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  • Santos Kuenstler

    Internet Explorer (formerly Microsoft Internet Explorer and Windows Internet Explorer, commonly abbreviated IE or MSIE) is a series of graphical web browsers developed by Microsoft and included as part of the Microsoft Windows line of operating systems, starting in 1995. It was first released as part of the add-on package Plus! for Windows 95 that year. Later versions were available as free downloads, or in service packs, and included in the OEM service releases of Windows 95 and later versions of Windows.-^”^

    With kind thoughts

  • colby

    thanks this worked perfect for what I needed.

  • jawad

    it says version 8 even for IE version 10

  • David

    Just what i was looking for. Thanks

  • oscar

    it does not work pal.

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