function sure(){
   return window.confirm("Are you sure to erase the form?");
   }

function controlli(form) {
  error=0;
  msg= "The following informations are not complete:\n\n";
  
	if (form.nome_it.value=="") { msg = msg + " »  Name italian\n";error=1;}
	if (form.nome_de.value=="") { msg = msg + " »  Name german\n";error=1;}
	if (form.nome_en.value=="") { msg = msg + " »  Name english\n";error=1;}
	if (form.testo_it.value=="") { msg = msg + " »  Text italian\n";error=1;}
	if (form.testo_de.value=="") { msg = msg + " »  Text german\n";error=1;}
	if (form.testo_en.value=="") { msg = msg + " »  Text english\n";error=1;}
	if (form.sender_email.value=="")  { msg = msg + " »  Email \n";error=1;}
	if (form.sender_email.value != "") { 
		regEx = /(.*)\@(.*)\.(.*)/;  
		if(!regEx.exec(form.sender_email.value)) {msg = msg + " »  Wrong E-mail\n";error=1;}
	}
	if (form.data.value != "") { 
		regEx = /(\d\d)\/(\d\d)\/(\d\d\d\d)/;  
		if(!regEx.exec(form.data.value)) {msg = msg + " »  Wrong date\n";error=1;}
	}
	if (form.datafine.value != "") { 
		regEx = /(\d\d)\/(\d\d)\/(\d\d\d\d)/;  
		if(!regEx.exec(form.datafine.value)) {msg = msg + " »  Wrong end date\n";error=1;}
	}
  
  if (error==0)
    {return true;}
  else 
     {alert(msg); return false;}

}