I would like to know if I can get an error or some other problems when I try to tween several objects like this and using an onComplete-property:

    TweenLite.to(restartBtn, .5, {alpha:0});
    TweenLite.to(mainMenuBtn, .5, {alpha:0, onComplete:quitFadeIn});
What I want to do is fade out several objects at once and when they finished a special function gets called. Are there other possibilities when using tweenlite available or do I have to use timelinelite?