var timer = Array();
var open = '';

function dropdown(id) {
  if (open != id) {
    if (document.getElementById(open)) {
      document.getElementById(open).style.display = 'none';
    }
  }

  open = id;
  document.getElementById(id).style.display = 'block';
}

function mousemove(id) {
    clearTimeout(timer[id]);
}

function mouseout(id) {
    timer[id] = setTimeout(function () { document.getElementById(id).style.display = 'none'; }, 200);
}