//市町村ドロップダウンの作成
function setSelectCity(prefName) {
	$.ajax({
		type: "POST",
		url: "../biosphere/include/retrunCityList.php",
		data: "pref_name=" + prefName,
		dataType: "text",
		success: function(result){
			var cityList = result.split(",");
			makeOption(cityList);
		}
	});
	
	
	makeOption = function(cityList) {
		$("#city_name option:nth-child(1)").selected = true;
		while ($("#city_name").children().length > 1) {
			$("#city_name option:nth-child(2)").remove();
		}
		
		
		for (var i=0; i<cityList.length-1; i++) {
			var cityName = cityList[i];
			$("#city_name").append($('<option>').attr({ value:cityName }).text(cityName));
		}
	}
}

$(document).ready(checkDefaultPref);
function checkDefaultPref() {
	if ($("select")[0].value) {
		var prefName = $("select")[0].value;
		setSelectCity(prefName);
	}
}