PeriodicalExecuter.prototype.registerCallback=function(){this.intervalID=setInterval(this.onTimerEvent.bind(this),this.frequency*1000);}
PeriodicalExecuter.prototype.stop=function(){clearInterval(this.intervalID);}
Effect.Scroll=Class.create();Object.extend(Object.extend(Effect.Scroll.prototype,Effect.Base.prototype),{initialize:function(element){this.element=$(element);var options=Object.extend({x:0,y:0,mode:'absolute'},arguments[1]||{});this.start(options);},setup:function(){if(this.options.continuous&&!this.element._ext){this.element.cleanWhitespace();this.element._ext=true;this.element.appendChild(this.element.firstChild);}
this.originalLeft=this.element.scrollLeft;this.originalTop=this.element.scrollTop;if(this.options.mode=='absolute'){this.options.x-=this.originalLeft;this.options.y-=this.originalTop;}else{}},update:function(position){this.element.scrollLeft=this.options.x*position+this.originalLeft;this.element.scrollTop=this.options.y*position+this.originalTop;}});Effect.ScrollHorizontal=Class.create();Object.extend(Object.extend(Effect.ScrollHorizontal.prototype,Effect.Base.prototype),{initialize:function(element)
{if(typeof element=="string")
{this.element=$(element);if(!this.element)
{throw(Effect._elementDoesNotExistError);}}
var options=Object.extend({from:this.element.scrollLeft||0,to:this.element.offsetWidth},arguments[1]||{});this.start(options);},update:function(position)
{this.element.scrollLeft=position;}});