jQuery.smoothScroll using HTML5 history API

gistfile1.js

        $("a[data-smoothscroll], [data-smoothscroll] a").click(function() {
            history.pushState({path: this.path}, '', this.href);
            $.smoothScroll({scrollTarget: location.hash, offset: -65});
            return false;
        });

        $(window).bind('popstate', function() {
            $.smoothScroll({scrollTarget: location.hash, speed: 0, offset: -65});
            return false;
        });