                               content: "/app/admin/upload/attachment?ext=jpg,jpeg,png,gif,bmp",
                                    area: ["95%", "90%"],
                                    success: function (layero, index) {
                                        parent.layui.$("#layui-layer" + index).data("callback", function (data) {
                                            input.val(data.url).prev().attr("src", data.url);
                                        });
                                 