Validation.addAllThese([
    ['validate-email', 'Formato non valido', { pattern : /^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/ }]
]);

if (!window.prototypeValidators) prototypeValidators = $A([]);
var validator = new Validation('form1', {onSubmit:true, focusOnError:true, stopOnFirst:false, immediate:true, useTitles:true});
prototypeValidators['form1'] = validator;