// Fonctions utilitaires

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