function affiche(calqueID){ quoi=document.getElementById(calqueID).style;with(quoi) {display=(display=="none") ? "block":"none";top=(display=="none") ? "0px":document.body.scrollTop+"px";}}
function efface(calqueID){ document.getElementById(calqueID).innerHTML="";}
function reclass(calqueID,nomclass){document.getElementById(calqueID).className=nomclass;}
function agred(quoi,mode){
	switch(mode){
		case 1 : base="100px";alter="100%";break;
		case 2 : base="100%";alter="100px";break;
		}
	with(quoi) height=(height==base) ? alter:base;
}