Smooth scroll any hashtag link to their ID.

Smooth Scroll.js

// Smooth scroll to content
$('a[href*=#]:not([href=#])').click(function() {
  if (location.pathname.replace(/^\//,'') == this.pathname.replace(/^\//,'') || location.hostname == this.hostname) {

    var targetH = $(this.hash),
      target = targetH.length ? targetH : $('[name=' + this.hash.slice(1) +']');

    if (target.length) {
      $('html,body').animate({
        scrollTop: target.offset().top - 60
      }, 600);
      return false;
    }
  }
});