var arr = [];

var key = 'Jeremy';

var value = '!!!!'

arr.push({

'key': key,

'value': value,

}); 

document.write("key: " + arr[]['key'] +

"<br/>value: " + arr[]['value']);

输出结果：

key: Jeremy

value: !!!!

var arr = [];

arr.push("Jeremy");

arr.push("Jimmy");

for(var i in arr)

document.write(i + ": " + arr[i] + "</br>");

输出结果：

: Jeremy

: Jimmy

var dict = []; //or dict = new Array()

dict["Jeremy"] = ;

dict["Jimmy"] = ;

for(var key in dict)

document.write(key + ": " + dict[key] + "</br>"); 

输出结果：

Jeremy:

Jimmy: 

var dict = {

"Jeremy" : ,

"Jimmy" :

};

for(var key in dict)

document.write(key + ": " + dict[key] + "</br>"); 

输出结果：

Jeremy:

Jimmy: 

var dict = {

"Jeremy" : ["Chinese", "Math"] ,

"Jimmy" : ["Art", "English"]

};

var name = "Jeremy";

for(var courseIndex in dict[name])

document.write(dict[name][courseIndex] + "</br>"); 

输出结果：

Chinese

Math

var dict = [];

var courseListOfJeremy = [

{"Chinese" : },

{"Math": }

];

dict['Jeremy'] = courseListOfJeremy;

var courseListOfJimmy = [

{"Art": },

{"English": }

];

dict['Jimmy'] = courseListOfJimmy; 

document.write("Jimmy's Course Number Of Chinese: " + dict['Jeremy'][]['Chinese']);

输出结果：

Jimmy's Course Number Of Chinese: 3

<h3>

    您的地址是：

</h3>

<select id="Province" onchange="SelectValueChanged('Province', 'Get_City')">

    <option id="Not_data1">Province</option>

    <option id="GuangDong" value="GuangDong">GuangDong</option>

    <option id="ShanDong" value="ShanDong">ShanDong</option>

    <option id="HuNan" value="HuNan">HuNan</opetion>

</select>

<select id="City" onchange="SelectValueChanged('City', 'Get_Country')">

    <option id="Not_data2">City</option>

</select>

<select id="Country">

    <option id="Not_data3">Country</option>

</select>

"use strict"

//初始化的数据

var placeDictionary = {

    "GuangDong":{

        "GuangZhou":["PanYu","HuangPu","TianHe"],

        "QingYuan":["QingCheng","YingDe","LianShan"],

        "FoShan":["NanHai","ShunDe","SanShui"]

    },

    "ShanDong":{

        "JiNan":["LiXia","ShiZhong","TianQiao"],

        "QingDao":["ShiNan","HuangDao","JiaoZhou"]

    },

    "HuNan":{

        "ChangSha":["KaiFu","YuHua","WangCheng"],

        "ChenZhou":["BeiHu","SuXian","YongXian"]

    }

};

//通过province或city的变化连动

function SelectValueChanged(idType, perpose) {

    var selectedValue = GetSelectedId(idType);

    if(perpose == "Get_City")

    {

        AddCity(selectedValue);

    }

    else if(perpose == "Get_Country")

    {

        AddCountry(selectedValue);

    }

}

function GetSelectedId(id){

    var prop = document.getElementById(id);

    var selectedValue = prop.options[prop.selectedIndex].id;

    return selectedValue;

}

function AddCity(provinceSelectedValue){

    //保持联动的一致性， 当Province的index变化时都需要清空City和Country的值

    $("#City").empty();

    $("#City").append("<option>City</option>");

    $("#Country").empty();

    $("#Country").append("<option>Country</option>");

    var cityNames = placeDictionary[provinceSelectedValue];

    for(var city in cityNames)

    {

        //这里遍历的值直接是value

        var value = "<option id='"+ city +"'>" + city + "</option>";

        $("#City").append(value);

    }

}

function AddCountry(citySelectedValue) {

    //保持联动一致性，当City的index变化时需要清空Country中的值

    $("#Country").empty();

    $("#Country").append("<option>Country</option>");

    var provinceSelectedId = GetSelectedId("Province");

    //获得城市列表

    var countries = placeDictionary[provinceSelectedId][citySelectedValue];

    for(var index in countries)

    {

        //这里index获取的是id 值

        var value = "<option id='"+ countries[index] +"'>" + countries[index] + "</option>";

        $("#Country").append(value);

    }

}