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 = Math.max( document.getElementById('leftmenu').offsetHeight, document.getElementById('content').offsetHeight);
      contentHeight = Math.max( contentHeight, document.getElementById('related').offsetHeight);
      contentHeight = contentHeight + document.getElementById('topcontent').offsetHeight;
      var footerElement = document.getElementById('footercontainer');
      var footerHeight  = footerElement.offsetHeight;
      if (windowHeight - (contentHeight + footerHeight) >= 0) {
        footerElement.style.position = 'relative';
        footerElement.style.top = (windowHeight - (contentHeight + footerHeight + 10)) + 'px';
      } else {
        footerElement.style.position = 'static';
      }
    }
    //document.getElementById('footer').style.visibility = "visible";
  }
}

window.onload = function() {
  setFooter();
}

window.onresize = function() {
  setFooter();
}