jQuery use Arrow Keys to go to next/previous (comic) page

arrowNav.js

(function($) {
    function goToComic(position) {
        comicLink = $('link[rel="' + position + '"]').attr('href');

        if (comicLink)
            window.location.href = comicLink;
    }

    $(document).keydown(function(e) {
        e.preventDefault(); 
        switch(e.which) {
            case 37:    
                // Left Key Pressed
                goToComic('prev');
                break;

            case 39:    
                // Right Key Pressed
                goToComic('next');
                break;

            default:
                return;
        }
    });
})(jQuery);