$(function () {

    var offset = $(".scroller").offset();
    try {
        var topPadding = parseInt($(".scroller").css('marginTop').replace('px', ''));
    } catch (e) {
        var topPadding = 0
    }

    $(window).scroll(function () {
        try {
            if ($(window).scrollTop() > offset.top - topPadding) {
                $(".scroller").css('margin-top', $(window).scrollTop() - offset.top + topPadding);
            } else {
                $(".-scroller").css('margin-top', topPadding);
            };
        } catch (e) { }

    });
});