function controllaiscrizione(f) {

  var Email;


    Email=document.getElementById('emailNewsLetter').value;  
      
//inizio controllo email
	if ((Email.length<6)) {
      alert ('Email errata! Email error!')
      return false;
	}
	if (!((navigator.appName=='Netscape') && (navigator.appVersion.split(' ')[0]<5))) {
		result=Email.match(/^[\w_-]+(\.[\w_-]+)*@[\w_-]+(\.[\w_-]+)*\.[a-z]{2,4}$/)
		   if ((result==null) || (!(result[0].length==Email.length))) {
         		alert("Errore Email! Email error!");
         		return false;
       		}
	}
//Fine controllo email

return true; 
}

function controllacancella(f) {

var Email;


Email=f.elements['email'].value;

//inizio controllo email
	if ((Email.length<6)) {
      alert ('Email errata! Email error!')
      return false;
	}
	if (!((navigator.appName=='Netscape') && (navigator.appVersion.split(' ')[0]<5))) {
		result=Email.match(/^[\w_-]+(\.[\w_-]+)*@[\w_-]+(\.[\w_-]+)*\.[a-z]{2,4}$/)
		   if ((result==null) || (!(result[0].length==Email.length))) {
         		alert("Errore Email! Email error!");
         		return false;
       		}
	}
//Fine controllo email
return true; 
}