//定义模块
layui.define(['form'], function(exports){

  var form = layui.form; //只有执行了这一步，部分表单元素才会自动修饰成功
  var $ = layui.$;

  var obj = {
    changeParentPlace: function (parentId,tagId,levelPlace) {
      $.ajax({
        url:ctx + '/base/place/changeParentPlace',
        type:'get',
        data:{
          parentId:parentId
        },
        dataType:'json',
        success:function (data) {
          $("#" + tagId).empty();
          $("#" + tagId).append('<option value="">请选择</option>');
          if(data.result != null && data.result.length != 0) {
            $.each(data.result,function(i,place) {
              if(levelPlace == place.name) {
                $("#" + tagId).append('<option selected value="'+place.id+'">'+place.name+'</option>')
              }else {
                $("#" + tagId).append('<option value="'+place.id+'">'+place.name+'</option>')
              }
            })
          }
          form.render('select'); //刷新select选择框渲染
        }
      })
    }
  }

  //输出模块
  exports('common', obj);
});

//设置模块
layui.config({
  base: ctx + '/js/app/modules/' //假设这是你存放拓展模块的根目录
}).extend({ //设定模块别名
  common:'common'
});

//调用模块

layui.use(['common'], function(){
  var common = layui.common;

  common.changeParentPlace($("#firstLevelId").val(),'secondLevelId');

});