省市区三级联动[JSON+Jquery]

 <script src="../Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
    <!--读取数据库，以json的格式输出，然后复制json数据，创建js文件--> 
    <script src="json/CityJson.js" type="text/javascript"></script>
    <script src="json/ProJson.js" type="text/javascript"></script>
    <script src="json/DistrictJson.js" type="text/javascript"></script>
    <script type="text/javascript">
        $(function () {

            $.each(province, function (k, p) { 
                var option = "<option value='" + p.ProID + "'>" + p.ProName + "</option>";
                $("#selProvince").append(option);
            });
             
            $("#selProvince").change(function () {
                var selValue = $(this).val(); 
                $("#selCity option:gt(0)").remove();
                 
                $.each(city, function (k, p) { 
                    if (p.ProID == selValue) {
                        var option = "<option value='" + p.CityID + "'>" + p.CityName + "</option>";
                        $("#selCity").append(option);
                    }
                });
                 
            });
             
            $("#selCity").change(function () {
                var selValue = $(this).val();
                $("#selDistrict option:gt(0)").remove(); 

                $.each(District, function (k, p) {
                    if (p.CityID == selValue) {
                        var option = "<option value='" + p.Id + "'>" + p.DisName + "</option>";
                        $("#selDistrict").append(option);
                    }
                }); 
            }); 
        });
    </script>
</head>
<body>
    <select id="selProvince">
        <option value="0">--请选择省份--</option>
    </select>
    <select id="selCity">
        <option value="0">--请选择城市--</option>
        <option>aaaa</option>
        <option>aaaa</option>
    </select>
    <select id="selDistrict">
        <option value="0">--请选择区/县--</option>
    </select>
    <input type="button" id="btnOK" value="确定" />
</body>
</html>
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