var opendoor = {

            execute: function () {

                console.log("开门");

            }

        };

        var closedoor = {

            execute: function () {

                console.log("关门");

            }

        };

        var lighton = {

            execute: function () {

                console.log("开灯");

            }

        };

        var cmd = function () {

            return {

                cmdList: [],

                add:function(c){

                    this.cmdList.push(c);

                },

                execute: function () {

                    for (var i = 0, c; c = this.cmdList[i++];) {

                        c.execute();

                    }

                }

            }

        };

        var command = cmd();

        command.add(opendoor);

        command.add(closedoor);

        command.add(lighton);

        command.execute();