Anchor smooth scrolling via jQuery

smoothscroll.js

APP.initAnchorScroll = function () {
  var anchorScroll = function (hash, event) {
    var headerHeight = $('.\\@header').find('.bar').outerHeight()
      , $target = $(hash);

    if (hash === '') {
      return;
    }

    $target = $target.length ? $target : $('a[name=' + hash.slice(1) + ']');

    if ($target.length < 1) {
      return;
    }

    if (event !== undefined) {
      event.preventDefault();
    }

    $('html,body').animate({
      scrollTop: $target.offset().top - headerHeight
    }, 1000);
  };

  $('a[href*=#]:not([href=#])').unbind('click.anchorscroll').bind('click.anchorscroll', function (e) {
    var href = $(this).attr('href');

    anchorScroll(href.substring(href.indexOf('#')), e);
  });

  anchorScroll(window.location.hash);
};

$(function () {
  APP.initAnchorScroll();
});