$(function() {

        function filterPath(string) {
                return string
                .replace(/^\//,'')
                .replace(/(index|default).[a-zA-Z]{3,4}$/,'')
                .replace(/\/$/,'');
        }

        var locationPath = filterPath(location.pathname);
        var scrollElem = scrollableElement('html', 'body');

        // Any links with hash tags in them (can't do ^= because of fully qualified URL potential)
        $('a[href*=#]').each(function() {

                // Ensure it's a same-page link
                var thisPath = filterPath(this.pathname) || locationPath;
                if (  locationPath == thisPath
                        && (location.hostname == this.hostname || !this.hostname)
                        && this.hash.replace(/#/,'') ) {

                                // Ensure target exists
                                var $target = $(this.hash), target = this.hash;
                                if (target) {

                                        // Find location of target
                                        var targetOffset = $target.offset().top;
                                        $(this).click(function(event) {

                                                // Prevent jump-down
                                                event.preventDefault();

                                                // Animate to target
                                                $(scrollElem).animate({scrollTop: targetOffset}, 1200, function() {

                                                        // Set hash in URL after animation successful
                                                        location.hash = target;

                                                });
                                        });
                                }
                }

        });

        // Use the first element that is "scrollable"  (cross-browser fix?)
        function scrollableElement(els) {
                for (var i = 0, argLength = arguments.length; i <argLength; i++) {
                        var el = arguments[i],
                        $scrollElement = $(el);
                        if ($scrollElement.scrollTop()> 0) {
                                return el;
                        } else {
                                $scrollElement.scrollTop(1);
                                var isScrollable = $scrollElement.scrollTop()> 0;
                                $scrollElement.scrollTop(0);
                                if (isScrollable) {
                                        return el;
                                }
                        }
                }
                return [];
        }

});