var counter=0;
function init()
{
 document.getElementById('moreFields').onclick=moreFields;
 moreFields();
}

function moreFields()
{
 if(counter<=9)
 {
  counter++;
  var newFields=document.getElementById('readroot').cloneNode(true);
  newFields.id='';
  newFields.style.display='block';
  var newField=newFields.childNodes;
  for(var i=0;i<newField.length;i++)
  {
	 var theName=newField[i].name;
	 if (theName)
			newField[i].name = theName + counter;
  }
  var insertHere=document.getElementById('writeroot');
  insertHere.parentNode.insertBefore(newFields,insertHere);
  document.getElementById('nb_max').value=counter;
 }
 else { alert("Pour ajouter plus d'invités, merci de valider cette liste."); }
}
window.onload = function () { if (self.init) { init(); } }