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Détection de la version d'Internet Explorer

/ Published in: JavaScript
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  1. <script>
  2. function getInternetExplorerVersion()
  3. // Returns the version of Internet Explorer or a -1
  4. // (indicating the use of another browser).
  5. {
  6.   var rv = -1; // Return value assumes failure.
  7.   if (navigator.appName == 'Microsoft Internet Explorer')
  8.   {
  9.     var ua = navigator.userAgent;
  10.     var re  = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
  11.     if (re.exec(ua) != null)
  12.       rv = parseFloat( RegExp.$1 );
  13.   }
  14.   return rv;
  15. }
  16. function checkVersion()
  17. {
  18.   var msg = "You're not using Internet Explorer.";
  19.   var ver = getInternetExplorerVersion();
  20.  
  21.   if ( ver > -1 )
  22.   {
  23.     if ( ver >= 6.1 ) 
  24.       msg = "You're using a recent copy of Internet Explorer."
  25.     else
  26.       msg = "You should upgrade your copy of Internet Explorer.";
  27.   }
  28.   alert( msg );
  29. }
  30. </script>

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