var colore_originale = '';

function mtm_over(el) {
  el.style.cursor = 'pointer';
  colore_originale = el.style.color;
  el.style.color = '#ffffff';
}

function mtm_out(el) {
  el.style.cursor = 'default';
  el.style.color = colore_originale;
}

function mtm_click(url) {
  document.location = url;
}

function closeDiv(el) {
  el.style.display = "none";
}
function openDiv(id) {
  var el = document.getElementById(id);
  el.style.display = "block";
  return false;
}