title: window.innerHeight ie8 alternative
body: <p>I have some calculations that rely on <code>window.innerHeight</code>. But as I have found out this is not available in any IE before IE9.  All the other options I have looked at don't even come close to the figure I get when I use <code>window.innerHeight</code>.</p>
  
  <p>Does anybody have a work around?</p>