jQuery smooth scroll to anchor

jQuery.smooth.js

jQuery(document).ready(function ($){
  
  // smooth scroll to anchor on page
  $('a[href*=#]:not([href=#])').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 scrollBy = target.offset().top;
        $('html,body').animate({
          scrollTop: scrollBy
        }, 750);
        return false;
      }
    }
  });
});