Event.observe(window, 'load', function() {
  $("l18").style.display = "none";
  $("e18").style.display = "block";
  $("yes18").onclick = function() {
    $("e18").style.display = "none";
    $("l18").style.display = "block";
    new Ajax.Request("/check_age", {
      method: "post",
      postBody: "y18=1",
    });
  }
  var wh = document.documentElement.clientHeight ? document.documentElement.clientHeight : window.innerHeight;
  var eh = $("e18").getHeight();
  var m = Math.floor((wh - eh) / 2);
  $("e18").style.marginTop = m + "px";
  $("no18").onclick = function() {
    window.location.href = "http://egyszervolt.hu";
  }
});