Hjälp med Jquery script

<script type='text/javascript' src='http://192.168.0.2/jquery.min.js'></script>
    <script type="text/javascript">
        $(function() {
            var offset = $("#centersidebar").offset();
            var topPadding = 50;
            $(window).scroll(function() {
                if ($(window).scrollTop() > offset.top) {
                    $("#centersidebar").stop().animate({
                        marginTop: $(window).scrollTop() - offset.top + topPadding
                    });
                } else {
                    $("#centersidebar").stop().animate({
                        marginTop: 0
                    });
                };
            });
        });
    </script>