function change(element) {
  if(document.getElementById(element).style.display == 'block')
      document.getElementById(element).style.display = 'none';
  else
    document.getElementById(element).style.display = 'block';
}

function show(element) {
  document.getElementById(element).style.visibility = 'visible';
}

function hide(element) {
  document.getElementById(element).style.visibility = 'hidden';
}

function checkpass() {
  if(document.getElementById("pass").value != document.getElementById("passcheck").value) {
    alert("Passordene er ikke like!");
    return false;
  }
}

function verifyPayment(name) {
  return confirm("Vil du registrere at " + name + " har betalt billetten kontant?");
}

function verifyCheckin(name) {
  return confirm("Vil du sjekke inn " + name + "?");
}

function verifyOrderDeletion() {
  return confirm("Sikker på at du vil slette valgt bestilling?");
}