$(function() {
  //||HAMSAHAQ|| Happy Halloween *HAMSAHAQ*الشبح !

  var ghost = document.createElement('IMG'), actif = false;
  ghost.src = 'http://i39.servimg.com/u/f39/18/21/60/73/ghost10.png';
  ghost.setAttribute('style','position:fixed;top:0%;left:0%;z-index:99999;display:none;');
  document.body.appendChild(ghost);
 
  ghost.onclick = function() { ghost.style.display = 'none' };
  window.setInterval('_spook_ghost()', 1000);
  _spook_ghost = function() {
    if (random(5) === 4 && actif === false) {
      actif = true;
      ghost.style.left = random(76) + '%';
      ghost.style.top = random(76) + '%';
      ghost.style.width = '48px';
      ghost.style.opacity = '1';
  ghost.style.display = '';
      _animation_ghost = window.setInterval(function() {
        if (Number(ghost.style.opacity) <= 0) {
          ghost.style.display = 'none';
          window.clearInterval(_animation_ghost);
          return actif = false;
        }
        ghost.style.width = Number(ghost.style.width.replace(/px/,'')) + 10 + 'px';
        ghost.style.opacity = Number(ghost.style.opacity) - 0.01;
      },1);
    }
  };
  function random(val) { return Math.floor(Math.random() * val) };
});

http://i39.servimg.com/u/f39/18/21/60/73/ghost10.png