function chgcouleurbarre(){
 with(document.body.style){
 scrollbarDarkShadowColor="#663399";
 scrollbar3dLightColor="#663399";
 scrollbarArrowColor="#996600";
 scrollbarBaseColor="#663399";
 scrollbarFaceColor="#a08000";
 scrollbarHighlightColor="#993333";
 scrollbarShadowColor="#CED6E4";
 scrollbarTrackColor="#E4E9F0";
 }
}