/*
 * Shamelessly stolen from ALA
 */
function getWindowHeight()
{
  var windowHeight = 0;
  if( typeof( window.innerHeight ) == 'number' )
  {
    windowHeight = window.innerHeight;
  }
  else
  {
    if( document.documentElement && document.documentElement.clientHeight )
    {
      windowHeight = document.documentElement.clientHeight;
    }
    else
    {
      if( document.body && document.body.clientHeight )
      {
        windowHeight = document.body.clientHeight;
      }
    }
  }
  
  return windowHeight;
}

function setFooter()
{
  if( document.getElementById )
  {
    var windowHeight = getWindowHeight();

    if( windowHeight > 0 )
    {
      var contentHeight = document.getElementById( 'container' ).offsetHeight;
      var footerElement = document.getElementById( 'footer' );
      var footerHeight  = footerElement.offsetHeight;
      
      if( windowHeight - ( contentHeight + footerHeight ) >= 0 )
      {
        footerElement.style.position = 'absolute';
        footerElement.style.top = ( windowHeight - footerHeight ) + 'px';
      }
      else
      {
        footerElement.style.position = 'static';
      }
    }
  }
}