$(function() {
	$('select#largeArea').change(changeLargeArea);
});

function changeLargeArea() {
	var val=$('select#largeArea').val();
	$.get(
		"/do/common/middlearea?largeAreaId="+val,
		function(data){
			$("select#middleArea").html(data);
		}
	);
}