基于layui实现select区域联动

<div>    <form>        <div>            <label>选择地区</label>            <div>                <select>                    <option>请选择省</option>                </select>            </div>            <div>                <select>                    <option>请选择市</option>                </select>            </div>            <div>                <select>                    <option>请选择区/县</option>                </select>            </div>        </div>        <div>            <label>选择地区</label>            <div>                <select>                    <option>请选择乡镇/街道</option>                </select>            </div>            <!--<div class="layui-input-inline">-->                <!--<select name="burg" lay-filter="burg" id="s_b">-->                    <!--<option value="1">庄/村</option>-->                <!--</select>-->            <!--</div>-->        </div>    </form></div>

<script>    layui.use([&#39;form&#39;, &#39;layer&#39;, &#39;laytpl&#39;, &#39;jquery&#39;], function () {        var form = layui.form            , $ = layui.jquery;        var parentId = &#39;0&#39;;        $(function () {            $.post(serverPath + "sys/area/backProvince/" + parentId, function (result) {                var p = result;                for (v in p) {                    var pp = p[v].id;                    $("#s_p").append("<option value=" + pp + ">" + p[v].fullname + "")                }                form.render();            })            form.on(&#39;select(province)&#39;, function (data) {                var p = $("#s_p").val();                if (p != "1") {                    $.post(serverPath + "sys/area/backProvince/" + p, function (result) {                        var c = result;                        $("#s_c").html("");                        $("#s_c").append("<option value=&#39;1&#39;>请选择市");                        $("#s_x").html("");                        $("#s_x").append("<option value=&#39;1&#39;>请选择县/区");                        $("#s_t").html("");                        $("#s_t").append("<option value=&#39;1&#39;>请选择乡镇/街道");                        $("#s_b").html("");                        $("#s_b").append("<option value=&#39;1&#39;>请选择村/街道号");                        for (v in c) {                            var cc = c[v].id;                            $("#s_c").append("<option value=" + cc + ">" + c[v].fullname + "")                        }                        form.render();                    })                }            });            form.on(&#39;select(city)&#39;, function (data) {                var c = $("#s_c").val();                if (c != "1") {                    $.post(serverPath + "sys/area/backProvince/" + c, function (result) {                        var x = result;                        $("#s_x").html("");                        $("#s_x").append("<option value=&#39;1&#39;>请选择县/区");                        $("#s_t").html("");                        $("#s_t").append("<option value=&#39;1&#39;>请选择乡镇/街道");                        $("#s_b").html("");                        $("#s_b").append("<option value=&#39;1&#39;>请选择村/街道号");                        for (v in x) {                            var xx = x[v].id;                            $("#s_x").append("<option value=" + xx + ">" + x[v].fullname + "")                        }                        form.render();                    });                }            });            form.on(&#39;select(area)&#39;, function (data) {                var x = $("#s_x").val();                if (x != "1") {                    $.post(serverPath + &#39;sys/area/backProvince/&#39;+ x, function (result) {                        var t = result;                        $("#s_t").html("");                        $("#s_t").append("<option value=&#39;1&#39;>请选择乡镇/街道");                        $("#s_b").html("");                        $("#s_b").append("<option value=&#39;1&#39;>请选择村/街道号");                        for (v in t) {                            var xx = t[v].id;                            $("#s_t").append("<option value=" + xx + ">" + t[v].fullname + "")                        }                        form.render();                    });                }            });        });    });</script>