if(window.addEventListener) {
  var keys = [], konami_code = "38,38,40,40,37,39,37,39,66,65";
  window.addEventListener("keydown", function(k){
    keys.push(k.keyCode);
    if(keys.toString().indexOf(konami_code) >= 0 ) {
      $('h1').addClass('leet');
    }
  }, true);
}