title: How to find the element position relative to it's parent to scroll it visible
body: <p>I have a div with lots of elements inside it, and <code>overflow: scroll</code>. Then i want to be able to scroll the nth element in view. I set a fiddle to it, but I can't find the expression to get the element position relative to the parent.</p>
  
  <p><a href="http://jsfiddle.net/bortao/NXcTK/" rel="noreferrer">http://jsfiddle.net/bortao/NXcTK/</a></p>
  
  <p>I tried both <code>el.position().top</code> and <code>el.offset().top</code> but they don't work.</p>
  
  <p>Note: <code>h / 2</code> is so the element is positioned in the middle of the div.</p>