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$(document).ready(function () {
                var aboveHeight = $('#topContainer').outerHeight();
                $(window).scroll(function () {
                    if ($(window).scrollTop() > aboveHeight) {
                        $('#menu').addClass('fixed').css('top', '0').next()
                            .css('padding-top', '50px');
                    } else {
                        $('#menu').removeClass('fixed').next()
                            .css('padding-top', '0');
                    }
                });
            });