                   jump: function(obj){
                                            //渲染HTML
                                            $("#attach_table tbody").empty();
                                            var thisData = r.data.concat().splice(obj.curr*obj.limit - obj.limit, obj.limit);
                                            layui.each(thisData, function(k, v){
                                                var row = "<tr><td>" + v.filename + "</td><td>"+ v.filesize +"</td><td>"+ v.fileti