コナミコマンド

gistfile1.js

    $(document).bind('keydown', detectKonamiCommand);

    var konamiTimer,
        konamiLog = [],
        keyMap = {
                37: '←',
                38: '↑',
                39: '→',
                40: '↓',
                65: 'A',
                66: 'B'
            };

    function detectKonamiCommand(e) {
        clearTimeout(konamiTimer);

        konamiLog.push(keyMap[e.keyCode]);

        if (konamiLog.join('').indexOf('↑↑↓↓←→←→BA') !== -1) {
            console.log('konami!!!!!!!!!!!!!');
            konamiLog = [];
        }

        konamiTimer = setTimeout(function() {
            console.log('clear');
            konamiLog = [];
        }, 800);
    }