A reliable jQuery keypress event especially for arrow keys

safekeypress.jquery.js

$.fn.safekeypress = function(func, cfg) {

    cfg = $.extend({
        stopKeys: {37:1, 38:1, 39:1, 40:1}
    }, cfg);

    function isStopKey(evt) {
        var isStop = (cfg.stopKeys[evt.keyCode] || (cfg.moreStopKeys && cfg.moreStopKeys[evt.keyCode]));
        if (isStop) evt.preventDefault();
        return isStop;
    }

    function getKey(evt) { return 'safekeypress.' + evt.keyCode; }

    function keypress(evt) {
        var key = getKey(evt),
            val = ($.data(this, key) || 0) + 1;
        $.data(this, key, val);
        if (val > 0) return func.call(this, evt);
        return isStopKey(evt);
    }

    function keydown(evt) {
        var key = getKey(evt);
        $.data(this, key, ($.data(this, key) || 0) - 1);
        return func.call(this, evt);
    }

    function keyup(evt) {
        $.data(this, getKey(evt), 0);
        return isStopKey(evt);
    }

    return $(this).keypress(keypress).keydown(keydown).keyup(keyup);
};

Thanks it's seem exactly what I need, can you give an example of use ?