scrolls to a point on a page given anchor & offset

scroll.jquery.js

//scrolls to a given point with offset n from point (750)
    scrollTo: function() {
        $('#main-nav').find('li > a').on("click", function(e){
            $('#main-nav').find('li').removeClass('active');
            $(this).parent().addClass('active');
            var id = $(this).attr("href");
            $('html, body').animate({
                scrollTop: $(id).offset().top
            }, 750);
            e.preventDefault();
        });
    },