var updater = Class.create({
			initialize: function(divToUpdate, interval, file) {
				this.divToUpdate = divToUpdate;
				this.interval = interval;
				this.file = file;
				new PeriodicalExecuter(this.getUpdate.bind(this), this.interval);
			},
			
			getUpdate: function() {
				var oOptions = {
					method: "GET",
					asynchronous: true,
					parameters: "intervalPeriod="+this.interval,
					onComplete: function (oXHR, Json) {
					 $(this.divToUpdate).innerHTML = oXHR.responseText;
					 new Effect.Appear(this.divToUpdate, { duration: 3.0 });


					}
				};
				
				var oRequest = new Ajax.Updater(this.divToUpdate, this.file, oOptions);
			}
		});