JS省市区三级联动

不需要访问后台服务器端，不使用Ajax，无刷新，纯JS实现的省市区三级联动。

当省市区数据变动是只需调正js即可。

使用方法：

<!DOCTYPE html>
<html>
<head>
<title>纯JS省市区联动</title>
<script type="text/javascript" src="jsAddress.js"></script>
</head>
<body>
<div>
省：<select id="cmbProvince"></select>
市：<select id="cmbCity"></select>
区：<select id="cmbArea"></select>
<br /><br />
省：<select id="Select1"></select>
市：<select id="Select2"></select>
区：<select id="Select3"></select>
<script type="text/javascript">
addressInit('cmbProvince', 'cmbCity', 'cmbArea', '陕西', '宝鸡市', '金台区');
addressInit('Select1', 'Select2', 'Select3');
</script>
</div>
</body>
</html>

核心代码如下：

var addressInit = function(_cmbProvince, _cmbCity, _cmbArea, defaultProvince, defaultCity, defaultArea)

{

    var cmbProvince = document.getElementById(_cmbProvince);

    var cmbCity = document.getElementById(_cmbCity);

    var cmbArea = document.getElementById(_cmbArea);

     

    function cmbSelect(cmb, str)

    {

        for(var i=0; i<cmb.options.length; i++)

        {

            if(cmb.options[i].value == str)

            {

                cmb.selectedIndex = i;

                return;

            }

        }

    }

    function cmbAddOption(cmb, str, obj)

    {

        var option = document.createElement("OPTION");

        cmb.options.add(option);

        option.innerHTML = str;

        option.value = str;

        option.obj = obj;

    }

     

    function changeCity()

    {

        cmbArea.options.length = 0;

        if(cmbCity.selectedIndex == -1)return;

        var item = cmbCity.options[cmbCity.selectedIndex].obj;

        for(var i=0; i<item.areaList.length; i++)

        {

            cmbAddOption(cmbArea, item.areaList[i], null);

        }

        cmbSelect(cmbArea, defaultArea);

    }

    function changeProvince()

    {

        cmbCity.options.length = 0;

        cmbCity.onchange = null;

        if(cmbProvince.selectedIndex == -1)return;

        var item = cmbProvince.options[cmbProvince.selectedIndex].obj;

        for(var i=0; i<item.cityList.length; i++)

        {

            cmbAddOption(cmbCity, item.cityList[i].name, item.cityList[i]);

        }

        cmbSelect(cmbCity, defaultCity);

        changeCity();

        cmbCity.onchange = changeCity;

    }

     

    for(var i=0; i<provinceList.length; i++)

    {

        cmbAddOption(cmbProvince, provinceList[i].name, provinceList[i]);

    }

    cmbSelect(cmbProvince, defaultProvince);

    changeProvince();

    cmbProvince.onchange = changeProvince;

}

 

var provinceList = [

{name:'北京', cityList:[        

{name:'市辖区', areaList:['东城区','西城区','崇文区','宣武区','朝阳区','丰台区','石景山区','海淀区','门头沟区','房山区','通州区','顺义区','昌平区','大兴区','怀柔区','平谷区']},

{name:'县', areaList:['密云县','延庆县']}

]},

{name:'上海', cityList:[        

{name:'市辖区', areaList:['黄浦区','卢湾区','徐汇区','长宁区','静安区','普陀区','闸北区','虹口区','杨浦区','闵行区','宝山区','金山区','松江区','青浦区','南汇区','奉贤区']},  

{name:'县', areaList:['崇明县']}

]}

];

实例下载：http://files.cnblogs.com/files/weihengblogs/jsAddress.rar