konamimyass :) Replace sicritW with whatever encoded as character numbers you want

secretwords.js

;(function(root, $, ns) {
    var w = root.window, 
        d = root.document, 
        MBX = !!w[ns] ? w[ns] : w[ns] = {},
        sicritW = "", // here you put your character table _ already encoded as numbers _
        letters = [],
        timerINYOFACE = null,
        jDoc = $(d);


    jDoc.on("keyup", function(e) {
        letters.push(e.keyCode);

        if (letters.join("").substr(-1*(sicritW.length)) == sicritW) {
            // do something
        }

        w.clearTimeout(timerINYOFACE);
        timerINYOFACE = w.setTimeout(function() {
            letters.length = 0;
        }, 1000);
    });

}(this, jQuery, "MBX"));