text: //****************针对第一种方式的具体js实现部分******************//
  //****************所使用的数据是city.js******************//
  
  /*根据id获取对象*/
  function $(str) {
      return document.getElementById(str);
  }
  
  var addrShow = $('addr-show');
  var btn = document.getElementsByClassName('met1')[0];
  var prov = $('prov');
  var city = $('city');
  var country = $('country');
  
  
  /*用于保存当前所选的省市区*/
  var current = {
      prov: '',
      city: '',
      country: ''
  };
  
  /*自动加载省份列表*/
  (function showProv() {
      btn.disabled = true;
      var len = provice.length;
      for (var i = 0; i < len; i++) {
          var provOpt = document.createElement('option');
          provOpt.innerText = provice[i]['name'];
          provOpt.value = i;
          prov.appendChild(provOpt);
      }
  })();
  
  /*根据所选的省份来显示城市列表*/
  function showCity(obj) {
      var val = obj.options[obj.selectedIndex].value;
      if (val != current.prov) {
          current.prov = val;
          addrShow.value = '';
          btn.disabled = true;
      }
      //console.log(val);
      if (val != null) {
          city.length = 1;
          var cityLen = provice[val]["city"].length;
          for (var j = 0; j < cityLen; j++) {
              var cityOpt = document.createElement('option');
              cityOpt.innerText = provice[val]["city"][j].name;
              cityOpt.value = j;
              city.appendChild(cityOpt);
          }
      }
  }
  
  /*根据所选的城市来显示县区列表*/
  function showCountry(obj) {
      var val = obj.options[obj.selectedIndex].value;
      current.city = val;
      if (val != null) {
          country.length = 1; //清空之前的内容只留第一个默认选项
          var countryLen = provice[current.prov]["city"][val].districtAndCounty.length;
          if(countryLen == 0){
              addrShow.value = provice[current.prov].name + '-' + provice[current.prov]["city"][current.city].name;
              return;
          }
          for (var n = 0; n < countryLen; n++) {
              var countryOpt = document.createElement('option');
              countryOpt.innerText = provice[current.prov]["city"][val].districtAndCounty[n];
              countryOpt.value = n;
              country.appendChild(countryOpt);
          }
      }
  }
  
  /*选择县区之后的处理函数*/
  function selecCountry(obj) {
      current.country = obj.options[obj.selectedIndex].value;
      if ((current.city != null) && (current.country != null)) {
          btn.disabled = false;
      }
  }
  
  /*点击确定按钮显示用户所选的地址*/
  function showAddr() {
      addrShow.value = provice[current.prov].name + '-' + provice[current.prov]["city"][current.city].name + '-' + provice[current.prov]["city"][current.city].districtAndCounty[current.country];
  }