Multipel page artickel dropdown, what addon am i looking for?

Hi,
Ill try and explain what i am looking for currently, if you know review sites a lot of them split there posts in to more sites, i know the wordpress insert, to split a post in more pages.

But here is what im looking for, a dropdown menu where i can right some text like this.

Presentation
In The box
Conclusion

So there is a easy navigation in posts, and its easy to get to the point where you wanna go.

Hope some one knows a plugin/addon for this, or a hack of some sort.

[No bumping, thank you.]