function selectWeatherPrefecture() {
	var select = $('weather_prefecture');
	var prefecture = select.options[select.selectedIndex].value;
	if (prefecture) {
		new Ajax.Updater(
			'weather_search',
			'/menu/weather_select_prefecture/',
			{
				method: 'post',
				parameters: 'prefecture=' + encodeURIComponent(prefecture)
			});
	}
}


function selectWeatherCity() {
	var select = $('weather_city');
	var city = select.options[select.selectedIndex].value;
	if (city) {
		new Ajax.Updater(
			'infoarea_b1',
			'/menu/weather_select_city/',
			{
				method: 'post',
				parameters: 'city=' + city
			});
	}
}