function time_field($en, $attr, $label = null)
{
$error = isset($en->errors[$attr]) ? "validation-error" : "";
$html = '<div class="form-field ' . $error . '">';
$label_text = $label;
if ($label == null) {
$label_text = Makiavelo::titlelize($attr);
}
$html .= '<label for="' . $attr . '">' . $label_text . '</label>';
$html .= '<input type="text"
class="time-field"
name="' . $en->__get_entity_name() . '[' . $attr . ']"
id="' . $en->__get_entity_name() . '_' . $attr . '"
value="' . $en->{$attr} . '" />';
$html .= "</div>";
return $html;
}