省份与城市的二级级联 用javascript实现答:220183|德惠市,220200|吉林市,220201|市辖区,220202|昌邑区,220203|龙潭区,220204|船营区,220211|丰满区,220221|永吉县,220281|蛟河市,220282|桦甸市,220283|舒兰市,220284|磐石市,220300|四平市,220301|市辖区,220302|铁西区,220303|铁东区,220322|梨树县,220323|伊通满族自治县,220381|公主岭市,220382|双辽市,...