How to change window title on a new popup window with custom height and width

Hi below is my code using a onclick with target="popup", how do I change the title of the new popup?

<a href="#" target="popup" 
  onclick="window.open('http://ift.tt/1UGj41N','popup','width=220,height=220,scrollbars=no,resizable=no'); return false;">Open new window</a>

via Chebli Mohamed