if (N == 3) {
            if (this._y<150) {
                this._y += guaiwu_ymove/2;
            }
            if (guaiwu_movetime>=50 || guaiwu.guaiwu_hp<5) {
                this._y += guaiwu_ymove/2;
            }
        }
如果需要怪物斜着从怪物从下面飞进从下面飞出，并且设定它的代号为4，即N==4那么我的代码是这么写的：                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 Flash射击游戏设计+需求分析(12):http://www.youerw.com/jisuanji/lunwen_464.html