//#####################################
// r?cup?ration du docuement.getElementById
//#####################################
function $(element){
   if(document.getElementById) { E = document.getElementById(element) }
   else if(document.all.tags) { E = document.all.tags(element) }
   else if(document.layers) { E = document.layers[element] }
   
   return E;
}



//#####################################
// gestion de l'affichage des images
//#####################################

var idphoto = 0;


function doPrevious(annee) {
    if (document.images) {
        idphoto-=1;
		if (idphoto <0) { idphoto=maGalerie.length+idphoto; }
        afficherphoto(idphoto,annee);
    }
    return false;
}

function doNext(annee) {
    if (document.images) {
        idphoto=idphoto+1;
        if ((idphoto == maGalerie.length) || (idphoto > maGalerie.length))	 { idphoto=idphoto-maGalerie.length; }
        afficherphoto(idphoto,annee);
    }
    return false;
}
 
function afficherphoto(idphoto,annee){

 	$("img").src="_photos/"+annee+"/"+maGalerie[idphoto];
	$("legende").innerHTML="©"+Annee[idphoto]+" - "+Legende[idphoto];
	$('num').innerHTML = "("+(idphoto+1)+" / " + maGalerie.length + ")";
	
 	
}