var scrollingOffset = function() {
        var headerHeight = $('.header').outerHeight();
        var id = window.location.hash.substr(1);

        $('.mainmenu a[href*="#"]').on('click', function(e) {
            var anchor = $(this.hash);

            if (location.pathname.replace(/^\//, '') == this.pathname.replace(/^\//, '') ||location.hostname == this.hostname) {
              anchor = anchor.length ? anchor : $('[name=' + this.hash.slice(1) + ']');
              if (anchor.length) {
                $("html, body").animate({
                  scrollTop: anchor.offset().top - headerHeight
                }, 1500);
                return false;
              }
            }

        });

        if (id != '' && $('#'+id).length>0) {
          if(id.indexOf('comment')>=0)$('.tab-product a[href="#reviews"]').tab('show');
          $("html, body").animate({
            scrollTop: $("#" + id).offset().top - headerHeight
        }, 1500);}
    };