konami.js

/**
 * Konami Code
 * @example
 * konami(function () {
 *     alert("easter egg!");
 * });
 */
function konami(success) {

    var keys = '',
        path = '38384040373937396665';

    addEventListener('keydown', function check(ev) {

        if ((keys += ev.keyCode) === path) {

            removeEventListener('keydown', check);

            if (success !== undefined) {
                success();
            }
        }
    });
}