var sleep_photo = 5000;
var photo_en_cours = [0,0,1,2,3,4,5,6,7,8];

function photo_droite(){
  var i;
  var nom_photo = "";

  no_photo_forward = no_photo + 9;
  if(no_photo_forward < max_photo){
    for(i = 1;i <= 9;i++,no_photo_forward++){
      nom_photo = "photo" + i;
      if(no_photo_forward < max_photo){
        document.getElementById(nom_photo).src = photos_small[no_photo_forward];
        photo_en_cours[i] = no_photo_forward;
      }else{
        document.getElementById(nom_photo).src = "/img/nophoto.jpg";
      }
    }
    no_photo += 9;
  }
}

function photo_gauche(){
  var i;
  var nom_photo = "";

  if(no_photo > 0){
    no_photo_back = no_photo - 9;
    for(i = 1;i <= 9;i++,no_photo_back++){
      nom_photo = "photo" + i;
      if(no_photo < max_photo){
        document.getElementById(nom_photo).src = photos_small[no_photo_back];
        photo_en_cours[i] = no_photo_back;
      }else{
        document.getElementById(nom_photo).src = "/img/nophoto.jpg";
      }
    }
    no_photo -= 9;
  }
}

function affiche_photo(p){
  if(photo_en_cours[p] < max_photo){
    document.getElementById("pic").src = photos[photo_en_cours[p]];
  }
}

function masque_photo(){
  document.getElementById("pic").src = "/img/transparent.gif";
}

function masque_photo_groupe(){
  document.getElementById("groupe").src = "/img/transparent.gif";
}

function wakeup_photo(){
  var p;
  
  p = photo_en_cours[0];
  while(p == photo_en_cours[0]){
    p = Math.floor(Math.random() * photos.length);
  }
  photo_en_cours[0] = p;
  document.getElementById("alea").src = photos_small[photo_en_cours[0]];
  setTimeout("wakeup_photo()",sleep_photo);
}

wakeup_photo();