function selectVademecums(select)
{
  var option = select.options[select.selectedIndex];
  var ul = select.parentNode.getElementsByTagName('ul')[0];
     
  var choices = ul.getElementsByTagName('input');
  for (var i = 0; i < choices.length; i++)
    if (choices[i].value == option.value)
      return;
     
  var li = document.createElement('li');
  var input = document.createElement('input');
  var text = document.createTextNode(option.firstChild.data);
     
  input.type = 'hidden';
  input.name = 'lista[]';
  input.value = option.value;

  li.appendChild(input);
  li.appendChild(text);
  li.setAttribute('onclick', 'this.parentNode.removeChild(this);');     
    
  ul.appendChild(li);
}