title: Fluid background image on browser resize
body: <p>I want to achieve the fluid background image effect that you can see in this webpage: 
  <a href="http://217.116.9.130/test2.html" rel="nofollow">http://217.116.9.130/test2.html</a> (taken from zara.com)</p>
  
  <p>If you resize your browser to the left the woman in the image goes left with your resizing.
  I've taken the code from zara.com but I suspect the effect is done by a language I don't know. </p>
  
  <p>Does anyone know and can give a clue (or hand me a link) on how to do it using jquery, css, ajax or php? </p>
  
  <p>Thanks a lot</p>