jquery smooth scroll on all <a> tags

jquery.smooth.js

// smooth scroll
$('a[href*="#"]:not([href="#"])').on("click", function() {
  if (location.pathname.replace(/^\//,'') === this.pathname.replace(/^\//,'') && location.hostname === this.hostname) {
    var target = $(this.hash);
    target = target.length ? target : $('[name=' + this.hash.slice(1) +']');
    if (target.length) {
      var toppie = target.offset().top - 50;
      $('html,body').animate({
        scrollTop: toppie
      }, 600);
      document.location.hash = this.hash.slice(1);
      return false;
    }
  }
});