【Layui】子页面向父级页面传递参数

var type_id;
    layui.use(['laypage', 'layer','form'], function() {
        var laypage = layui.laypage
            , layer = layui.layer,
            form = layui.form;
        form.on('select(type_mid)', function(data){
            type_id = data.value;
        })
    });
    function show_layer(){
        layer.open({
            type: 2,
            area: [1000+'px', 1000+'px'],
            fix: false, //不固定
            maxmin: true,
            shadeClose: true,
            shade:0.4,
            title: '扩展分类',
            content: 'type?type_id='+type_id,  //url 为子布局的url路径
            success:function (layero,index) {
               console.log('我是咔咔')
            }
        });
    }