title: can not disable Ctrl+O by JavaScript in IE 11
body: <p>I'm trying to disable Ctrl+o key combination in IE, the following code works fine in all IE versions except IE 11 unless I do an alert as you see in code below: </p>
  
  <pre><code>document.onkeydown = function(event) {
      var x = event.keyCode;
      console.log(event.keyCode);
      console.log(event.ctrlKey);
      if ((x == 79) &amp;&amp; (event.ctrlKey)) {
          if(navigator.userAgent.match(/rv:11.0/i)){
              alert('Disabled');
          }
          event.cancelBubble = true;
          event.returnValue = false;
          event.keyCode = 0;
          event.stopPropagation();
          event.preventDefault();
  
          return false;
      }
  };
  </code></pre>
  
  <p>I was wondering if anyone else is experiencing the same issue and they have solved it. :-)
  Thanks.
  Alex</p>