Event.observe(window, 'load', function() {
  $$(".shadowed").each(function(_element) {
    _element.innerHTML += "\
    <div class=\"shadow shadow_bottom\"></div>";
    /*
    <div class=\"shadow shadow_top\"></div>         \
    <div class=\"shadow shadow_top_left\"></div>         \
    <div class=\"shadow shadow_left\"></div>         \
    <div class=\"shadow shadow_right\"></div>        \
    <div class=\"shadow shadow_top_right\"></div>        \
    <div class=\"shadow shadow_bottom_left\"></div>  \
    <div class=\"shadow shadow_bottom_right\"></div> \
    */
  });
});