jquery link click scroll

1// Select all links with hashes
2$('a[href*="#"]')
3  // Remove links that don't actually link to anything
4  .not('[href="#"]')
5  .not('[href="#0"]')
6  .click(function(event) {
7    // On-page links
8    if (
9      location.pathname.replace(/^\//, '') == this.pathname.replace(/^\//, '') 
10      && 
11      location.hostname == this.hostname
12    ) {
13      // Figure out element to scroll to
14      var target = $(this.hash);
15      target = target.length ? target : $('[name=' + this.hash.slice(1) + ']');
16      // Does a scroll target exist?
17      if (target.length) {
18        // Only prevent default if animation is actually gonna happen
19        event.preventDefault();
20        $('html, body').animate({
21          scrollTop: target.offset().top
22        }, 1000, function() {
23          // Callback after animation
24          // Must change focus!
25          var $target = $(target);
26          $target.focus();
27          if ($target.is(":focus")) { // Checking if the target was focused
28            return false;
29          } else {
30            $target.attr('tabindex','-1'); // Adding tabindex for elements not focusable
31            $target.focus(); // Set focus again
32          };
33        });
34      }
35    }
36  });