13. The method of claim 2 , further comprising: displaying an interactive cubic Bézier curve editor with an animation speed simulator.
13. The method of claim 2 , further comprising: displaying an interactive cubic Bézier curve editor with an animation speed simulator. 14. The method of claim 13 , wherein the animation speed simulator visibly simulates a speed of the style sheet animation of the first animation object from the first keyframe to the second keyframe.