jquery.konami.js

/**
 * jQuery Konami event plugin
 * Called after the ↑ ↑ ↓ ↓ ← → ← → B A keyboard sequence is completed.
 * by Sunny Ripert <http://sunfox.org>, under the WTFPL <http://sam.zoy.org/wtfpl/>
 *
 * Example:
 *   $(window).konami(function() {
 *     alert('Konami!')
 *   })
**/
$.fn.konami = function(callback) {
  var keys = [], sequence = /38,38,40,40,37,39,37,39,66,65$/
  $(this).bind('keydown.konami', function(e) {
    keys.push(e.keyCode);
    if (keys.toString().match(sequence))
      callback(e);
  }, true);
};