function chgtruc(cible) {
  for (i=1; i<=9; i++) {
    if (i==cible) {
      document.getElementById("tructxt"+i).style.display = "inline";
      document.images[roll_liens[i]].src = '../img/bt_' + roll_liens[i] + '_roll.gif';
    }
    else {
      document.getElementById("tructxt"+i).style.display = "none";
      document.images[roll_liens[i]].src = '../img/bt_' + roll_liens[i] + '_off.gif';
    }
  }
  roll_courant = roll_liens[cible];
  return false;
}

function afficheAnnee(){
	param = window.location.search.slice(1,window.location.search.length);
	tmp = param.split("=");
	num = tmp[1];
	if (num){
		return chgtruc(num);
	}
}

function roll_on(nom) {
  if (document.images && nom!=roll_courant) {
    document.images[nom].src = '../img/bt_' + nom + '_off.gif';
  }
}

function roll_off(nom) {
  if (document.images && nom!=roll_courant) {
    document.images[nom].src = '../img/bt_' + nom + '_roll.gif';
  }
}

function roll4b_on(nom) {
  if (document.images) {
    document.images[nom].src = '../img/bt_' + nom + '_off.gif';
  }
}

function roll4b_off(nom) {
  if (document.images) {
    document.images[nom].src = '../img/bt_' + nom + '_roll.gif';
  }
}


function rollongal(txt) {
  if (locknum == false){
    if (txt) document.getElementById('img'+txt).style.visibility = 'visible';
  }
  
}

function rolloffgal(txt) {
  if (locknum == false){
    if (txt) document.getElementById('img'+txt).style.visibility = 'hidden';
  }
  
}

function allNum(){
  if (locknum == false){
    locknum = true;
  }
  else {
    locknum = false;
  }
  for (i=1;i<20;i++){
    if ($('imgphoto'+i)){
      elt = $('imgphoto'+i);
      if (elt.style.visibility=='visible'){
        elt.style.visibility = 'hidden';
      } else {
        elt.style.visibility = 'visible';
      }
    }
  }
}