function grandir(im_nom,im_l,im_h,im_com) {
	im_image.src="";
	id_sound.src="DINGDONG.MID";
	im_image.style.visibility='hidden';
	im_image.alt="";
	im_rapport=im_l/im_h;
	msg=im_l+" / "+im_h+" = "+im_rapport;
	status=msg;
	if (im_rapport>fen_rapport){
	   im_image.width=fen_l;
	   im_image.height=im_image.width/im_rapport;
	   }
	else {
	   im_image.height=fen_h - 40;
	   im_image.width=im_image.height * im_rapport;
	   }
	msg=msg+"  ==> "+im_image.width+" / "+im_image.height;
	msg=msg+" = "+im_image.width/im_image.height;
	im_image.style.left=(fen_l-im_image.width)/2;
	im_image.style.top=id_body.scrollTop+(fen_h-im_image.height)/2;
	im_image.src=im_nom;
	div_liste.style.visibility='hidden';
	im_image.alt=im_com;
	im_image.style.visibility='visible';
	status=msg;
}
function proprietes(objet,mot) {
	msg=" \<input type=button value='Retour page précédente' ";
	msg=msg+" onclick='history.go(-1)';\>\<br\>";
	msg=msg+'<br><b> Propriétés de l\'objet &lt;'+objet.tagName+'&gt; '+mot+' :</b><br>';
	for (propri in objet)
		{ msg=msg+propri+' = '+objet[propri]+'<br>'; }
	document.write(msg);
}