省份与城市的二级级联 用javascript实现答:330481|海宁市,330482|平湖市,330483|桐乡市,330500|湖州市,330501|市辖区,330502|吴兴区,330503|南浔区,330521|德清县,330522|长兴县,330523|安吉县,330600|绍兴市,330601|市辖区,330602|越城区,330621|绍兴县,330624|新昌县,330681|诸暨市,330682|上虞市,330683|嵊州市,330700|金华市,330701|市辖区,330702|婺城...