title: set a height on a item
body: <p>I have this javascript:</p>
  
  <pre><code>   $('.focus .box.border').height($('.box.border').maxHeight() + 'px');
  </code></pre>
  
  <p>I put a height on the <code>box.border</code> element. But how can i put a extra 15 pixels to the height. But how can I give an extra height to 15 pixels.</p>
  
  <p>Thanks for helping</p>