Never have an anchor jumping your content, slide it. Don't forget to put an id to your anchor!

/*******

 ***  Anchor Slider by Cedric Dugas   ***
 *** Http://www.position-absolute.com ***

 Never have an anchor jumping your content, slide it.

 Don't forget to put an id to your anchor !
 You can use and modify this script for any project you want, but please leave this comment as credit.

 *****/

$(document).ready(function () {
  $("a.anchorlink").anchorAnimate();
});

jQuery.fn.anchorAnimate = function (settings) {
  settings = jQuery.extend({
    speed: 1200
  }, settings);

  return this.each(function () {
    var caller = this;

    $(caller).click(function (event) {
      event.preventDefault();

      var locationHref = window.location.href;
      var elementClick = $(caller).attr("href");
      var destination = $(elementClick).offset().top;

      $("html:not(:animated),body:not(:animated)").animate({
        scrollTop: destination
      }, settings.speed, function () {
        window.location.hash = elementClick;
      });

      return false;
    });
  });
};