function imprimer(chemin) {
PosX=(screen.width-800)/2;
PosY=(screen.height-560)/2;
FenPop=window.open(chemin,'page','top='+PosY+',left='+PosX+',width=700,height=500,scrollbars=1,toolbar=0,menubar=1,status=0,resizable=1');
}