// Create namespace
if (at == undefined) 
var at = {};

if (at.bartelme == undefined) at.bartelme = {};


// Newsticker Class

at.bartelme.newsticker = Class.create();

at.bartelme.newsticker.prototype = {
	
	initialize: function()
 {
		
		// Get elements
		
		this.interval = 10000;
		
		this.container = $("newsticker");
		
		this.messages  = $A(this.container.getElementsByTagName("li"));
		
		this.number_of_messages = this.messages.length;
		
		if (this.number_of_messages == 0)
 {
			
			this.showError();
			
			return false;
		
		}
		
		this.current_message = 0;

		this.previous_message = null;


		// Create toggle button
	
		this.toggle_button = document.createElement("a");

		this.toggle_button.href = "#";

		this.toggle_button.id = "togglenewsticker";

		this.toggle_button.innerHTML = "Toogle";

		Event.observe(this.toggle_button, "click", this.toggle.bindAsEventListener(this), false);
				 	//this.container.appendChild(this.toggle_button);
	
		this.hideMessages();
		
		this.showMessage();
		
		// Install timer
		
		this.timer = setInterval(this.showMessage.bind(this), this.interval);

	},
	showMessage: function()
	{
		
		Effect.Appear(this.messages[this.current_message]);

		setTimeout(this.fadeMessage.bind(this), this.interval-2000);
		if (this.current_message < this.number_of_messages-1)
 {

			this.previous_message = this.current_message;
			this.current_message = this.current_message + 1;
		} else {

			this.current_message = 0;

			this.previous_message = this.number_of_messages - 1;

		}
	},
	fadeMessage: function()
	{

		Effect.Fade(this.messages[this.previous_message]);

	},
	hideMessages: function()
 {

		this.messages.each(function(message)
 { Element.hide(message); })
	
	},
	toggle: function()
 {

		Effect.BlindUp(this.container, 1000);
	
	},
	showError: function()
	{
		
		if (this.container.getElementsByTagName("ul").length == 0)
 {
			
			this.list = document.createElement("ul");

			this.container.appendChild(this.list);
		} else {
			this.list = this.container.getElementsByTagName("ul")[0];

		}

		this.errorMessage = document.createElement("li");

		this.errorMessage.className = "error";

		this.errorMessage.innerHTML = "Could not retrieve data";

		this.list.appendChild(this.errorMessage);

	}

}


Event.observe(window, "load", function(){ new at.bartelme.newsticker() }, false);