Small scrolling script for fun. Not sure how well it works. Please contribute if you have ideas.

scroll.js

Scrolling = {};
$.extend(Scrolling, {
  smoothScrollTo: function(top) {
    var sm_speed = 300;
    var sm_runs = 0;
    var sm_last = -1; // don't use 0, b/c sm_window_top can be 0
    var sm_window_top = $(window).scrollTop();
    var sm_down = (top > sm_window_top);
    var sm_each_step = (sm_down ? top - sm_window_top  : sm_window_top - top) / (sm_speed / 13);
    var sm_scroll = function() {
      sm_window_top = $(window).scrollTop();
      $(window).scrollTop(sm_window_top + (sm_down ? sm_each_step : -(sm_each_step)));
      if (sm_window_top != sm_last && sm_runs < 1000 && (sm_down && sm_window_top < top || !sm_down && sm_window_top > top)) {
        sm_runs += 1;
        sm_last = sm_window_top;
        setTimeout(sm_scroll, 13);
      }
    }
    sm_scroll();
  },
  smoothScrollToBottom: function() {
    Scrolling.smoothScrollTo($(document).height() - $(window).height());
  },
  scrollToBottom: function() {
    $(window).scrollTop($(document).height() - $(window).height());
  }
});