Sorry if I've misunderstood your question, but I'm not really sure how you mean so I've done two different examples hoping that at least one of them will help you.
What I've done here is I've added -webkit-animation-fill-mode: forwards;
which will maintaine the last state of the animation, making the div stay visible at the position you have set.
In this demo, I'm animating the opacity
instead of the positions.
So insted of sliding the div from top: -80;
to top: 0;
the div fill just fade into place. Also this example uses the -webkit-animation-fill-mode: forwards;
.
Here's a good resource if you want to read about CSS animations. http://www.w3.org/TR/css3-animations/
Hope this helps!