function displayNav() {
  var ul = document.getElementById('menuv');
  if (ul==null) return;

  var h1s = document.getElementsByTagName('h1');
  if (h1s.length==0) return;
  var h1 = h1s[0];

  var uls = ul.getElementsByTagName('ul');
  if (uls.length==0) return;

  ul = uls[0];

  var parentH1 = h1.parentNode;
  if (parentH1==null) return;

  //var afterH1 = h1.nextSibling;
  //if (afterH1==null) return;

  var newUL = ul.cloneNode(true);
  newUL.setAttribute("id", "navSousH1");

  parentH1.insertBefore(newUL, h1);
}

function popupImage(url, width, height) {
  window.open(url, '', 'width='+width+', height='+height+', scrollbars=0');
}