protected function _renderVarDisplay_phone($form, &$var, &$vars)
{
global $registry;
$number = $var->getValue($vars);
$html = htmlspecialchars($number);
if ($number && $registry->hasMethod('telephony/dial')) {
$url = $registry->call('telephony/dial', array($number));
$label = sprintf(Horde_Core_Translation::t("Dial %s"), $number);
$html .= ' ' . Horde::link($url, $label) . Horde::img('phone.png', $label) . '</a>';
}
return $html;
}