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 (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 = http://www.mamicode.com/[‘请选择‘, ‘-2‘];"<option value=http://www.mamicode.com/‘"+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="http://www.mamicode.com/areaData.js"></script><script src="http://www.mamicode.com/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    });