title: Custom scroll bar behavior in Javascript?
body: <p>I'd like to reproduce an effect similar to this page: <a href="http://artofflightmovie.com/" rel="nofollow">http://artofflightmovie.com/</a> where the vertical scrollbar controls the progression of the browser "viewport" over a pre-defined path. </p>
  
  <p>I am thinking the easiest way of going about this is through the use of javascript to read the scroll bar value and position background elements accordingly.</p>
  
  <p>Is it possible to obtain the vertical scroll bar value in Javascript? Am I approaching this design wrong?</p>