function controlli(form)
  {
  error=0;
  msg= "Fields not complete:\n\n";
  
   if (form.Email.value=="")  { msg = msg + " »  Email \n";error=1;}
   if (form.fiera_corrente.selectedIndex == 0)  { msg = msg + " »  Newsletter not selected \n";error=1;}
   
	if (form.Email.value != "")  
		{ 
		    regEx = /(.*)\@(.*)\.(.*)/;  
		    if(!regEx.exec(form.Email.value)) {msg = msg + " »  Wrong E-MAIL!\n ";error=1;} 
	       }
   if (form.action[0].checked==true && form.check.checked==false){ msg = msg + " »  Assent to INFORMATION ABOUT THE USE OF PERSONAL DATA";error=1;}

  
  if (error==0)
    {return true;}
  else 
     {alert(msg); return false;}

}