Problem with google chrome - loading

Hi,

I have a problem with my animation. For some reason it's working perfectly on Firefox but on Chrome, the animation starts before the complete loading of the images. And on IE it's shaking. here is a link to the animation :

http://www.legroupenorplan.com/animation/Norplan_Animation_new4.html

Anyone knows why it does that pleaasseeeeeee ?

Thank