$(function () {
    $(".commentsButton a").click(function () { 
        $(this).parent().siblings(".comments").toggleClass("hidden");
        var state = $(this).find(".toggleArrows").html();

        if (state.match(/>&gt/)) {
            var html = "<<";
        } else {
            var html = ">>"
        }
        
        $(this).find(".toggleArrows").html(html);
        return false;
    });
});