easter egg

konami.js

$(document).ready(function() {

    var easterEgg = 'egg';
    var eggLength = easterEgg.length;
    var keyHistory = '';
    var match;
        $(document).keypress(function(e) {
            keyHistory += String.fromCharCode(e.which)
            match = keyHistory.match(easterEgg); 
            if(match) {
                alert(match);
                keyHistory = match =  '';
            } else if (keyHistory.length > 30) {
                keyHistory = keyHistory.substr((keyHistory.length - eggLength - 1));
            }
        });
});