title: jQuery: get elements above a given 'y' position
body: <p>How can you do this with jQuery, in an elegant way?</p>
  
  <blockquote>
    <p>Apply <code>z</code> attribute <em>(e.g.: red background)</em> to every children of a div <code>parent</code><br/>
    while their position is above a given top-offset <code>y</code>.</p>
  </blockquote>
  
  <p>I've tried in different ways, but I'm not happy with any of them...<br />
  I know there must be a short  and elegant way to do it...</p>