onloadAddFunction(
function() {
Effect.Scroll = Class.create();

            Object.extend(Object.extend(Effect.Scroll.prototype, Effect.Base.prototype), {

              initialize: function(element) {

                this.element = $(element);

                var options = Object.extend({

                  x:    0,

                  y:    0,

                  mode: 'absolute'

                } , arguments[1] || {}  );

                this.start(options);

              },

              setup: function() {

                if (this.options.continuous && !this.element._ext ) {

                  this.element.cleanWhitespace();

                  this.element._ext=true;

                  this.element.appendChild(this.element.firstChild);

                }

               

                this.originalLeft=this.element.scrollLeft;

                this.originalTop=this.element.scrollTop;

               

                if(this.options.mode == 'absolute') {

                  this.options.x -= this.originalLeft;                                                      

                  this.options.y -= this.originalTop;

                } else {

               

                }

              },

              update: function(position) {   

                this.element.scrollLeft = this.options.x * position + this.originalLeft;

                this.element.scrollTop  = this.options.y * position + this.originalTop;

              }

            });
});