function playKonami() {
    alert("hello");
}

var input = [], konami = "38,38,40,40,37,39,37,39,66,65"
$(window).on("keydown",function(e) {
    console.log(e.which);
    input.push(e.which)
    if (input.toString().indexOf(konami) >= 0) { playKonami() }
})