家庭账本开发day08

对查询到额数据进行相关的操作，删除。对删除按钮绑定事件

点击后发送ajax请求到servlet，删除相关的数据后，返回flag到前端

若后台删除成功，则前台进行相应的.close()；输出点击行的数据。若

失败弹出提示。

//向服务端发送删除指令
                        $.ajax({
                            url:'BillServlet?method=delete',
                            type:'post',
                            data:{'id':data.billid},//向服务端发送删除的id
                            success:function(flag){
                                console.log(flag);
                                console.log(typeof flag);
                                if(flag=="true"){
                                    obj.del(); //删除对应行（tr）的DOM结构，并更新缓存
                                    layer.close(index);
                                    console.log(index);
                                    layer.msg("删除成功",{icon:1});
                                }
                                else{
                                    layer.msg("删除失败",{icon:5});
                                }
                            }
                        });
                        layer.close(index);