"

From 2013.igem.org

$(window).scroll(function () {

   if ($(window).scrollLeft() > 0) {
       $('#navbar').css('left', -($(window).scrollLeft()) + 30);
   }
   else {
       $('#navbar').css('left', 30);
   }

} );

var offset = 800;

$('.navbar li a').click(function(event) {

   window.location.hash = $(this).attr('href')
   event.preventDefault();
   $($(this).attr('href'))[0].scrollIntoView();
   scrollBy(0, -offset);

});