smooth page scroll

smoothscroll.js

// requires jQuery and jQuery Easing
var $ = jQuery.noConflict();
function smoothScroll(element, speed, effect, offset) {
    $(element).bind('click', function (event) {
        $('html, body').stop().animate({
            scrollTop: ($($(this).attr('href')).offset().top) - offset
        }, speed, effect);
        event.preventDefault();
    });
}
$(function () {   
  smoothScroll('a.smooth', 1000, 'easeInOutExpo', 120);
});