function idd(countries, $country, $phone) {
	var $idd = $('<span class="idd"></span>');

	function updateIdd() {
		var alpha2 = $country.val(),
			country = _(countries).detect(function(country) { return country.alpha_2 == alpha2 });
		$idd.text(country ? '+' + country.idd : '');

		$country.next('.flag').html('<img src="/img/flags/' + country.alpha_2.toLowerCase() + '.png" />');
	}

	$phone.before($idd);
	$country.after('<span class="flag"></span>');

	$country.change(updateIdd);
	updateIdd();
}