scroll.js

var cubes = $$('a.cube');
cubes.each(function(cube,i) {
cube.addEvent('click',function(e) {
    e.stop();
    var to = $(cube.get("rel")).getPosition();
    to.x = 0; to.y = to.y - 300;
    var scroll = new Fx.Scroll(window,{
      duration: 1000,
      offset: to
    }).start();
  });
});