title: How to unbind a specific event handler
body: <p><strong>Code:</strong>   </p>
  
  <pre><code>$('#Inputfield').keyup(function(e)
          {
              if(e.which == 13)
              {
                  functionXyz();
              }
              else
              {
                  functionZyx();
              }
      });  
  
  
  $(document).keyup(function(exit) {
                if (exit.keyCode == 27) { functionZzy(); }
  });
  </code></pre>
  
  <p><strong>Question:</strong> How to remove the keyup event handler of keyCode == 27 and keep the other $(document).keyup event handlers intact?</p>