//添加动画缓存		cc.spriteFrameCache.addSpriteFrames(res.bug_plist);		this.spriteSheet = new cc.SpriteBatchNode(res.bug_png);		this.addChild(this.spriteSheet);

//初始化动作		var animFrames = [];		for (var i = 1; i <= 2; i++) {			var str = "hero" + i + ".png";			var frame = cc.spriteFrameCache.getSpriteFrame(str);			animFrames.push(frame);		}		animation = new cc.Animation(animFrames, 1);		this.runningAction = new cc.Animate(animation);		this.runningAction.retain();

sprite1.runAction(cc.RepeatForever(this.runningAction));