jquery插件-省市联动

 /**
     * 保存地区信息
     * 数据格式
     * areaData = [{‘pro‘: ‘北京‘, ‘cities‘: {‘-1‘: ‘北京‘}}, {...}]
     * 直辖市存在-1，表示就是直辖市
     */
    (function(window) {
    window.areaData = 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})(window);

 (function($){
 /**
  * 省市联动
  * @param {Array} areaData 地区数组 格式：[{pro: ‘北京‘, cities: {-1: 北京, 0: 东城区, ...}},{...}]
  * @param {Object} options 一些配置选项
  * @returns {Object} jQuery对象
  */
 $.fn.citySelect = function(areaData, options){
  if(!$.isArray(areaData)) return;
  var opts = $.extend({
   provinceID: -1,
   cityID: -1,
   isShowDefaultVal: true,
   isDealComArea: false
  }, options);
  var $province = $(this).find(‘select‘).eq(0);
  var $city = $(this).find(‘select‘).eq(1);
  //-1是直辖市信息
  var provicneID = opts.provinceID;
  var cityID = opts.cityID;
  var isShowDefaultVal = opts.isShowDefaultVal;
  var isDealComArea = opts.isDealComArea;
  var defaultData = [‘请选择‘, ‘-2‘];
  var tmpArr = [];
 
  //增加下拉项到临时数组
  var addOpt = function(val,text,defVal){
   tmpArr.push("<option value=‘"+val+"‘ "+(parseInt(defVal,10)==parseInt(val,10)+‘‘?"selected":"")+">"+text+"</option>");
  };
 
  //省份变更联动城市下拉
  var changeHandler = function(){
   var provinceID = $province.val();
   tmpArr = [];
 
   //非省【请选择】情况下，不显示地市【请选择】
   provinceID == -2 && isShowDefaultVal && addOpt(defaultData[1],defaultData[0]);
   if(provinceID != -2) {
    $.each(areaData[provinceID][‘cities‘], function(cid, city) {
     //是否只显示直辖市
     if(isDealComArea && provinceID < 4) {
      addOpt(cityID, areaData[provinceID][‘pro‘], cityID);
      return false;
     }else {
      cid != -1 && addOpt(cid, city， cityID);
     }
    });
   }
   $city.html(tmpArr.join(‘‘));
  };
 
  //初始化省份
  var initProvince = function() {
   tmpArr = [];
   //默认省级下拉
   isShowDefaultVal && addOpt(defaultData[1],defaultData[0]);
   $.each(areaData, function(pid,details){
    addOpt(pid,details.pro,provicneID);
   });
   $province.html(tmpArr.join(‘‘));
  };
 
  //初始化事件
  var init = function() {
   initProvince();
   //省级联动 控制
   $province.on(‘change‘, changeHandler);
   changeHandler();
  }
 
  init();
 
  return this;
 };
}(jQuery));

<!DOCTYPE html>
<html>
<head>
    <title>省市联动</title>
    <meta charset="utf-8">
</head>
<body>
<div class="area">
    <select name="province"></select>
    <select name="city"></select>
</div>
<script src="areaData.js"></script>
<script src="provinceCity.js"></script>
</body>
</html>

$(‘.area‘).citySelect(areaData);

$(‘.area‘).citySelect(areaData, {
        isShowDefaultVal: false
    });

$(‘.area‘).citySelect(areaData, {
        provinceID: 10,
        cityID: 3,
        isShowDefaultVal: false
    });

$(‘.area‘).citySelect(areaData, {
        provinceID: 0,
        cityID: -1,
        isDealComArea: true,
        isShowDefaultVal: false
    });