function veriform(form) {
	var MelRegExp = new RegExp('^[a-z0-9\._-]+@[a-z0-9\.-]{2,}\.[a-z]{2,3}$',"gi");

	ok = false ;
	switch (form.formulaire.value)
	{
	case 'email': 
		email = MelRegExp.test(form.Email.value); 

		ok = email ;
		if ( !ok )
		{   
			alerte = "Compléter ou corriger :\r\n";
			if (!email) alerte += "- Votre email\r\n";			
			alert(alerte);
		}
		break;
  case 'reservation': 
		email = MelRegExp.test(form.Email.value); 
		nom=form.Nom.value.length>1;
		prenom=form.Prenom.value.length>1;

		ok = email && nom && prenom;
		if ( !ok )
		{   
			alerte = "Check :\r\n";
			if (!nom) alerte += "- Your name\r\n";
      if (!prenom) alerte += "- Your surname\r\n";	
      if (!email) alerte += "- Your email\r\n";			
			alert(alerte);
		}
		break;
	}
	return ok ;
}