a go to id js

1    //scroll to id
2    var $root = $('html, body');
3    $('a[href^="#"]').click(function () {
4        var href = $.attr(this, 'href');
5        $root.animate({
6            scrollTop: $(href).offset().top
7        }, 500, function () {
8            window.location.hash = href;
9        });
10
11        return false;
12    });