Chosen 是一個JavaScript插件，它能讓丑陋的、很長的select選擇框變的更好看、更方便,不僅如此，它更擴大了，增長了主動篩選的功能。

本文介紹Chosen聯動，具體代碼如下：

var addressResolve = function (options) {  //檢測用戶傳進來的參數是否合法  if (!isValid(options))    return this;  //默認參數  var defaluts = {    proId: 'divProv',    cityId: 'divCity',    areaId: 'divArea'  };  var opts = $j.extend({}, defaluts, options);//使用jQuery.extend 覆蓋插件默認參數  var addressInfo = this;  this.provInfo = $j("#" + opts.proId);//省份select對象  this.cityInfo = $j("#" + opts.cityId);//城市select對象  this.areaInfo = $j("#" + opts.areaId);//區縣select對象  /*省份初始化方法*/  this.provInfoInit = function () {    var proOpts = "";    $j.each(provinceJson, function (index, item) {      proOpts += "<option value='" + item.ProID + "'>" + item.name + "</option>";    });    addressInfo.provInfo.append(proOpts);    addressInfo.provInfo.chosen(); //初始化chosen    addressInfo.cityInfo.chosen();//初始化chosen    addressInfo.areaInfo.chosen();//初始化chosen  };  /*城市選擇綁定方法*/  this.selectCity = function () {    addressInfo.cityInfo.empty();    addressInfo.cityInfo.append("<option value=選擇城市>選擇城市</option>");    addressInfo.areaInfo.empty();    addressInfo.areaInfo.append("<option value=選擇區縣>選擇區縣</option>");    if (addressInfo.provInfo.val() == "選擇省份") { //選擇無效時直接返回      addressInfo.cityInfo.trigger("liszt:updated");      addressInfo.areaInfo.trigger("liszt:updated");      return;    }    var provId = addressInfo.provInfo.val();//獲取選擇的省份值    var cityOpts = "";    $j.each(cityJson, function (index, item) {      if (item.ProID == provId) {        cityOpts += "<option value='" + item.CityID + "'>" + item.name + "</option>";      }    });    addressInfo.cityInfo.append(cityOpts);    addressInfo.cityInfo.trigger("liszt:updated");    addressInfo.areaInfo.trigger("liszt:updated");  };  /*區縣選擇綁定方法*/  this.selectArea = function () {    if (addressInfo.cityInfo.val() == "選擇城市") return;    addressInfo.areaInfo.empty();    addressInfo.areaInfo.append("<option value=選擇區縣>選擇區縣</option>");    var cityId = addressInfo.cityInfo.val();//獲取選擇的城市值    var areaOpts = "";    $j.each(areaJson, function (index, item) {      if (item.CityID == cityId) {        areaOpts += "<option value='" + item.Id + "'>" + item.DisName + "</option>";      }    });    addressInfo.areaInfo.append(areaOpts);    addressInfo.areaInfo.trigger("liszt:updated");  };  /*對象初始化方法*/  this.init = function () {    addressInfo.provInfo.append("<option value=選擇省份>選擇省份</option>");    addressInfo.cityInfo.append("<option value=選擇城市>選擇城市</option>");    addressInfo.areaInfo.append("<option value=選擇區縣>選擇區縣</option>");    addressInfo.provInfoInit();    addressInfo.provInfo.bind("change", addressInfo.selectCity);    addressInfo.cityInfo.bind("change", addressInfo.selectArea);  }  //私有方法，檢測參數是否合法  function isValid(options) {    return !options || (options && typeof options === "object") ? true : false;  }}