command （命令）模式

 (function(){
        var carManager = {
            requestInfo:function(model,id){
                return ‘the infomation for ‘+model+‘ with ‘ + id+‘ is in foobar‘;
            },
            buyVehicle:function(model,id){
                return ‘you hava successed buy  ‘+model+‘ with ‘ + id+‘ ‘;
            },
            arrangeViewing:function(){}
        };
        carManager.execute = function(name){
            return carManager[name] && carManager[name].apply(carManager,[].slice.call(arguments,1));
        };

        carManager.execute(‘requestInfo‘,‘mini‘,‘1234‘);

    })();