Random Up, Down, Left, Right

uplr.random.bkmrk.js

(function () {
    function shuffle(array) {
        var currentIndex = array.length,
        temporaryValue,
        randomIndex
        ;
        // While there remain elements to shuffle...
        while (0 !== currentIndex) {
            // Pick a remaining element...
            randomIndex = Math.floor(Math.random() * currentIndex);
            currentIndex -= 1;
            // And swap it with the current element.
            temporaryValue = array[currentIndex];
            array[currentIndex] = array[randomIndex];
            array[randomIndex] = temporaryValue;
        }
        return array;
    }
    var characterKeys = [
        38,
        //u
        40,
        //d
        37,
        //l
        39
        //u
    ];
    // The Konami code
    var kbEvent = document.createEvent('KeyboardEvent');
    // Chromium Hack
    Object.defineProperty(kbEvent, 'keyCode', {
        get: function () {
            return this.keyCodeVal;
        }
    });
    Object.defineProperty(kbEvent, 'which', {
        get: function () {
            return this.keyCodeVal;
        }
    });
    // Creating the event
    var evtArgs = [
        'keydown',
        true,
        true,
        document.defaultView,
        false,
        false,
        false,
        false,
        0,
        0
    ];
    // Here's the magic !
    for (var i = 0; i < 1000; i += 1) {
        var rand = Math.floor(Math.random() * characterKeys.length);
        if (kbEvent.initKeyboardEvent) {
            evtArgs.splice(evtArgs.length - 2, 2, characterKeys[rand], characterKeys[rand]);
            kbEvent.initKeyboardEvent.apply(kbEvent, evtArgs);
        } else {
            evtArgs.splice(evtArgs.length - 2, 2, characterKeys[rand], 0);
            kbEvent.initKeyEvent.apply(kbEvent, evtArgs);
        }
        kbEvent.keyCodeVal = characterKeys[rand];
        document.body.dispatchEvent(kbEvent);
    }
})();

uplr.random.bkmrk.min.js

(function(){var c=[38,40,37,39],a=document.createEvent("KeyboardEvent");Object.defineProperty(a,"keyCode",{get:function(){return this.keyCodeVal}});Object.defineProperty(a,"which",{get:function(){return this.keyCodeVal}});for(var b=["keydown",!0,!0,document.defaultView,!1,!1,!1,!1,0,0],e=0;1E3>e;e+=1){var d=Math.floor(Math.random()*c.length);a.initKeyboardEvent?(b.splice(b.length-2,2,c[d],c[d]),a.initKeyboardEvent.apply(a,b)):(b.splice(b.length-2,2,c[d],0),a.initKeyEvent.apply(a,b));a.keyCodeVal=
c[d];document.body.dispatchEvent(a)}})();