function changer(travail,height,scrollto,diff) {
	// on change la hauteur
	var fx = new Fx.Style('image','height',{duration: 350});
	fx.start(height);
	// on scrolle l'image
	var scroll = new Fx.Scroll('image', {duration: 350});
	scroll.scrollTo(0,scrollto);

}

var initscroll=0;