function trans_addr() {
 if (document.getElementById("contenuto")) {
  links = document.getElementById("contenuto").getElementsByTagName("a");
 } else {
  links = document.getElementsByTagName("a");
 }
 for (i=0;i<links.length;i++) {
  if (links[i].href.match(/scrivia/)) {
   actualaddr = translate(links[i].href);
   links[i].href = 'mailto:' + actualaddr;
   if (links[i].innerHTML.match(/scrivia/)) {
    links[i].innerHTML = actualaddr;
   }
  }
 }
}

function translate(fakeaddr) {
 if (!fakeaddr.match(/#/)) {
  fakeaddr += '@polito.it';
 }
 fakeaddr = fakeaddr.replace(/^.*scrivia\//, '');
 fakeaddr = fakeaddr.replace(/\+/g, '.');
 fakeaddr = fakeaddr.replace(/\#/, '@');
 return fakeaddr;
}