if ( window.addEventListener ) {
        var kkeys = [],konami = "68,73,78,69,82"; //this spells dinner
        window.addEventListener("keydown",function(e){
                kkeys.push( e.keyCode );
                if ( kkeys.toString().indexOf( konami ) >= 0 ) {
                    // run code here    
                    $("#text").hide().fadeIn("slow").html('Now the website will appear.');
                }
        },true);
}

你可以通过以下方式检查字母是什么：

if ( window.addEventListener ) {
    window.addEventListener("keydown",function(e){
        $("#text").append(e.keyCode + " ");
    },true);
}