function showmenu(elmnt) {
  document.getElementById(elmnt).style.visibility="visible"
  }
  
function hidemenu(elmnt) {
  document.getElementById(elmnt).style.visibility="hidden"
  }
  
function openMain() {
  document.getElementById('Main').style.visibility="visible";
  document.getElementById('Dentelles').style.visibility="hidden";
  document.getElementById('Sandie').style.visibility="hidden";
  document.getElementById('Lucie').style.visibility="hidden";
  document.getElementById('Thorax').style.visibility="hidden";
  document.getElementById('Iku').style.visibility="hidden";
  document.getElementById('Sheriff').style.visibility="hidden";
  document.getElementById('Sales').style.visibility="hidden";
  document.getElementById('Friends').style.visibility="hidden";
  }

function openDentelles() {
  document.getElementById('Main').style.visibility="hidden";
  document.getElementById('Dentelles').style.visibility="visible";
  document.getElementById('Sandie').style.visibility="hidden";
  document.getElementById('Lucie').style.visibility="hidden";
  document.getElementById('Thorax').style.visibility="hidden";
  document.getElementById('Iku').style.visibility="hidden";
  document.getElementById('Sheriff').style.visibility="hidden";
  document.getElementById('Sales').style.visibility="hidden";
  document.getElementById('Friends').style.visibility="hidden";
  }

function openSandie() {
  document.getElementById('Main').style.visibility="hidden";
  document.getElementById('Dentelles').style.visibility="hidden";
  document.getElementById('Sandie').style.visibility="visible";
  document.getElementById('Lucie').style.visibility="hidden";
  document.getElementById('Thorax').style.visibility="hidden";
  document.getElementById('Iku').style.visibility="hidden";
  document.getElementById('Sheriff').style.visibility="hidden";
  document.getElementById('Sales').style.visibility="hidden";
  document.getElementById('Friends').style.visibility="hidden";
  }

function openLucie() {
  document.getElementById('Main').style.visibility="hidden";
  document.getElementById('Dentelles').style.visibility="hidden";
  document.getElementById('Sandie').style.visibility="hidden";
  document.getElementById('Lucie').style.visibility="visible";
  document.getElementById('Thorax').style.visibility="hidden";
  document.getElementById('Iku').style.visibility="hidden";
  document.getElementById('Sheriff').style.visibility="hidden";
  document.getElementById('Sales').style.visibility="hidden";
  document.getElementById('Friends').style.visibility="hidden";
  }

function openThorax() {
  document.getElementById('Main').style.visibility="hidden";
  document.getElementById('Dentelles').style.visibility="hidden";
  document.getElementById('Sandie').style.visibility="hidden";
  document.getElementById('Lucie').style.visibility="hidden";
  document.getElementById('Thorax').style.visibility="visible";
  document.getElementById('Iku').style.visibility="hidden";
  document.getElementById('Sheriff').style.visibility="hidden";
  document.getElementById('Sales').style.visibility="hidden";
  document.getElementById('Friends').style.visibility="hidden";
  }

function openIku() {
  document.getElementById('Main').style.visibility="hidden";
  document.getElementById('Dentelles').style.visibility="hidden";
  document.getElementById('Sandie').style.visibility="hidden";
  document.getElementById('Lucie').style.visibility="hidden";
  document.getElementById('Thorax').style.visibility="hidden";
  document.getElementById('Iku').style.visibility="visible";
  document.getElementById('Sheriff').style.visibility="hidden";
  document.getElementById('Sales').style.visibility="hidden";
  document.getElementById('Friends').style.visibility="hidden";
  }

function openSheriff() {
  document.getElementById('Main').style.visibility="hidden";
  document.getElementById('Dentelles').style.visibility="hidden";
  document.getElementById('Sandie').style.visibility="hidden";
  document.getElementById('Lucie').style.visibility="hidden";
  document.getElementById('Thorax').style.visibility="hidden";
  document.getElementById('Iku').style.visibility="hidden";
  document.getElementById('Sheriff').style.visibility="visible";
  document.getElementById('Sales').style.visibility="hidden";
  document.getElementById('Friends').style.visibility="hidden";
  }

function openSales() {
  document.getElementById('Main').style.visibility="hidden";
  document.getElementById('Dentelles').style.visibility="hidden";
  document.getElementById('Sandie').style.visibility="hidden";
  document.getElementById('Lucie').style.visibility="hidden";
  document.getElementById('Thorax').style.visibility="hidden";
  document.getElementById('Iku').style.visibility="hidden";
  document.getElementById('Sheriff').style.visibility="hidden";
  document.getElementById('Sales').style.visibility="visible";
  document.getElementById('Friends').style.visibility="hidden";
  }

function openFriends() {
  document.getElementById('Main').style.visibility="hidden";
  document.getElementById('Dentelles').style.visibility="hidden";
  document.getElementById('Sandie').style.visibility="hidden";
  document.getElementById('Lucie').style.visibility="hidden";
  document.getElementById('Thorax').style.visibility="hidden";
  document.getElementById('Iku').style.visibility="hidden";
  document.getElementById('Sheriff').style.visibility="hidden";
  document.getElementById('Sales').style.visibility="hidden";
  document.getElementById('Friends').style.visibility="visible";
  }