title: Disable Navigation Keys \ Change Their Function
body: <p>For example, I am able to prevent the back key from exiting the app using this function:</p>
  
  <pre><code>function onDeviceReady(){
      document.addEventListener("backbutton", onBackKeyDown, false);
  }
  function onBackKeyDown(){
      alert('back');
      return false;
  }
  </code></pre>
  
  <p>How can I do the same for the over two navigation keys?
  I used a plugin to hide the whole navigation bar, but it comes back whenever the keyboard comes up.</p>
  
  <p>Thanks in advance.</p>