Unbind keypress handler for specific combination only
<p>I have 2 keydown handlers:</p>

<pre><code>$(document).bind('keydown', function(e) {
   if (e.keyCode == 75) {
       // handler1 strategy
   } else if (e.keyCode == 78) {
       // handler2 strategy
   }

});
</code></pre>

<p>How can I unbind one handler without affecting all the other keydown handlers?</p>

<p>updated.</p>
