function changeImage(chemImg, libelle, code) {
	$('.img_affiche img').attr("src",chemImg);
	$('.img_affiche img').attr("alt",libelle);
	$('.img_affiche img').attr("title",libelle);
	var html = $.ajax({
		   type: "POST",
		   url: "changeLegende.php",
		   async: false,
		   data: "code="+code}).responseText;
	if(html!="")
	{
		$('.legende_photo').empty();
		$('.legende_photo').append(html);
	}
}