jquery for sticky menu

jQuery(document).ready(function($) {

    /* Stick navigation to the top of the page */
    var stickyNavTop = $('.main-navigation').offset().top;

    $(window).scroll(function(){
        var scrollTop = $(window).scrollTop();

        if (scrollTop > stickyNavTop) {
            $('.main-navigation').addClass('sticky-header');
            $('.site-header').addClass('shifted');
        } else {
            $('.main-navigation').removeClass('sticky-header');
            $('.site-header').removeClass('shifted');
        }

    });

/* Scroll to specific section on front page */
        $(function() {
            $('a[href*=#]:not([href=#])').click(function() {
                if (location.pathname.replace(/^\//,'') == this.pathname.replace(/^\//,'') && location.hostname == this.hostname) {
                    var target = $(this.hash);
                    target = target.length ? target : $('[name=' + this.hash.slice(1) +']');
                    if (target.length) {
                        $('html,body').animate({
                            scrollTop: (target.offset().top - 80)
                        }, 1000);
                        return false;
                    }
                }
            });
        });

});