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

scroll.js

// muhaha.. changed all the code

// maybe this version handles scrolling to the bottom edge of a document a little better
// still not satisfied with the speed variable.. should that be higher == more speed, perhaps? or pixels per second?
// sorry about the opinionated style changes
Scrolling = {
  smoothScrollTo: function(target_top) {
    // ensure that we never scroll further than viewport size from bottom of the doc
    target_top = Math.min(target_top, Math.max($(document).height(), $(window).height()) - $(window).height());
    var speed = 30,
        window_top = $(window).scrollTop(),
        each_step = (target_top - window_top) / speed;
    var scroll = function() {
      $(window).scrollTop(window_top += each_step);
      // there is a cleaner way to do this check
      if (Math.floor(window_top / speed) != Math.floor(target_top / speed)) {
        setTimeout(scroll, 13);
      }
    }
    scroll();
  },
  smoothScrollToBottom: function() {
    Scrolling.smoothScrollTo($(document).height() - $(window).height());
  },
  scrollToBottom: function() {
    $(window).scrollTop($(document).height() - $(window).height());
  }
};