jQuery二级联动

时间：2023-01-15 15:29:45
<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>二级联动</title>

    <script src="js/jquery-1.7.1.js"></script>

    <style>

    </style>

    <script type="text/javascript">

        $(function(){

            var provinces = ['北京', '上海', '浙江'];

            var provinceCityMap = {

                '北京': ['东城','西城','崇文','宣武','朝阳'],

                '上海': ['黄浦','卢湾','徐汇','长宁','静安'],

                '浙江': ['杭州','嘉兴','宁波','温州','湖州']

            };

            var $province = $('#province');

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

                $('<option>' + provinces[i] + '</option>')

                        .appendTo($province)

                        .val(provinces[i]);

            }

            $province.on('change', function() {

                //当前选中的省的值

                var citySelected = $province.find('option:selected').val();

                //console.log(citySelected);

                changeCitys(citySelected);

            });

            function changeCitys(province) {

                $('.city').empty();

                var citys = provinceCityMap[province];

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

                    $('<option>' + citys[i] + '</option>')

                            .appendTo('.city')

                            .val(citys[i]);

                }

            }

            changeCitys($province.find('option:selected').val());

            $('.show').on('click', function() {

                console.log($province.find('option:selected').val());

            });

        });

    </script>

</head>

<body>

<select id="province"></select>

<select class="city"></select>

<button class="show">显示</button>

</body>

</html>

　　

相关文章