title: Change backgroundImage button on hover Titanium
body: <p>Is it possible to change the backgroundImage of a button in Titanium when it is hovered?
  I have the following code for my button:</p>
  
  <pre><code>var btnLogin = Titanium.UI.createButton({
          title : 'Log in',
          top : '260',
          height : '50',
          width : '270',
          backgroundImage : '../images/button.png'
      });
  </code></pre>