jQuery四级联动下拉菜单代码

部分js代码

	<script type="text/javascript">
		var $town = $('#demo3 select[name="town"]');
		var townFormat = function(info){
			$town.hide().empty();
			if(info['code']%1e4&&info['code']<7e5){	//是否为“区”且不是港澳台地区
				$.ajax({
					url:'http://passer-by.com/data_location/town/'+info['code']+'.json',
					dataType:'json',
					success:function(town){
						$town.show();
						for(i in town){
								$town.append('<option value="'+i+'">'+town[i]+'</option>');
						}
					}
				});
			}
		};
		$('#demo3').citys({
			province:'福建',
			city:'厦门',
			area:'思明',
			onChange:function(info){
				townFormat(info);
			}
		},function(api){
			var info = api.getInfo();
			townFormat(info);
		});
	</script>