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 // NOTICE!! DO NOT USE ANY OF THIS JAVASCRIPT
 // IT'S JUST JUNK FOR OUR DOCS!
 // ++++++++++++++++++++++++++++++++++++++++++
 /*!
  * Copyright 2014 Twitter, Inc.
  *
  * Licensed under the Creative Commons Attribution 3.0 Unported License. For
  * details, see http://creativecommons.org/licenses/by/3.0/.
  */
 // Intended to prevent false-positive bug reports about Bootstrap not working properly in old versions of IE due to folks testing using IE's unreliable emulation modes.
 (function () {
   'use strict';
 
   function emulatedIEMajorVersion() {
     var groups = /MSIE ([0-9.]+)/.exec(window.navigator.userAgent)
     if (groups === null) {
       return null
     }
     var ieVersionNum = parseInt(groups[1], 10)
     var ieMajorVersion = Math.floor(ieVersionNum)
     return ieMajorVersion
   }
 
   function actualNonEmulatedIEMajorVersion() {
     // Detects the actual version of IE in use, even if it's in an older-IE emulation mode.
     // IE JavaScript conditional compilation docs: http://msdn.microsoft.com/en-us/library/ie/121hztk3(v=vs.94).aspx
     // @cc_on docs: http://msdn.microsoft.com/en-us/library/ie/8ka90k2e(v=vs.94).aspx
     var jscriptVersion = new Function('/*@cc_on return @_jscript_version; @*/')() // jshint ignore:line
     if (jscriptVersion === undefined) {
       return 11 // IE11+ not in emulation mode
     }
     if (jscriptVersion < 9) {
       return 8 // IE8 (or lower; haven't tested on IE<8)
     }
     return jscriptVersion // IE9 or IE10 in any mode, or IE11 in non-IE11 mode
   }
 
   var ua = window.navigator.userAgent
   if (ua.indexOf('Opera') > -1 || ua.indexOf('Presto') > -1) {
     return // Opera, which might pretend to be IE
   }
   var emulated = emulatedIEMajorVersion()
   if (emulated === null) {
     return // Not IE
   }
   var nonEmulated = actualNonEmulatedIEMajorVersion()
 
   if (emulated !== nonEmulated) {
     window.alert('WARNING: You appear to be using IE' + nonEmulated + ' in IE' + emulated + ' emulation mode.\nIE emulation modes can behave significantly differently from ACTUAL older versions of IE.\nPLEASE DON\'T FILE BOOTSTRAP BUGS based on testing in IE emulation modes!')
   }
 })();