I have an element that spins when you hover over it indefinitely. When you hover out, the animation stops. Simple:
@-webkit-keyframes rotate {
from {
It took a few tries, but I was able to get your jsFiddle to work (for Webkit only).
There's still an issue with the animation speed when the user re-enters the div.
Basically, just set the current rotation value to a variable, then do some calculations on that value (to convert to degrees), then set that value back to the element on mouse move and mouse enter.
Check out the jsFiddle: http://jsfiddle.net/4Vz63/46/
Check out this article for more information, including how to add cross-browser compatibility: http://css-tricks.com/get-value-of-css-rotation-through-javascript/