title: JavaScript can't capture "SHIFT+TAB" combination
body: <p>For whatever reason I can't capture "SHIFT+TAB" combination.
  I am using the latest jQuery.</p>
  
  <p>Same result if I use other ajax/javascript, etc.</p>
  
  <p>Here is a simple example that should work as I currently understand it...</p>
  
  <p>event.which or event.KeyCode are always "undefined" only shiftKey exists in a scenario involving a "SHIFT+TAB" or backward keyboard traversal, traditionally inherent in windows based apps/web or otherwise...</p>
  
  <pre><code>    function ShiftTab()
      {
        debugger;
        if(event.KeyCode == 9 &amp;&amp; event.shiftKey) // neither this line nor the following work
  //      if (event.which == 9 &amp;&amp; event.shiftKey) // shift + tab, traverse backwards, using keyboard
        {
          return true;
        }
        else
        {
          return false;
        }
      }
  </code></pre>
  
  <p>this seems to be yet another item related to tab order that no longer works as it traditionally worked in Microsoft.Net WinForm/WebForm based apps.</p>