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 = "Check or complete :\r\n";
			if (!email) alerte += "- Your email\r\n";			
			alert(alerte);
		}
		break;
  case 'reservation': 
		email = MelRegExp.test(form.Email.value); 
		surname=form.Surname.value.length>2;
    name=form.Name.value.length>2;

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