function afterBodyLoad() {
  var heightContent = document.getElementById("content").offsetHeight;
  if ( heightContent == null ) {
    heightContent = 700;
  }
  
  // set the height of the left and right box to the same height as the content
  document.getElementById("secondaryNav").style.height = heightContent + 'px';
  document.getElementById("secondaryContent").style.height = heightContent + 'px';
}