var Core = {};

// W3C DOM 2 Events model
if (document.addEventListener)
{
  Core.addEventListener = function(target, type, listener)
  {
    target.addEventListener(type, listener, false);
  };

  Core.removeEventListener = function(target, type, listener)
  {
    target.removeEventListener(type, listener, false);
  };

  Core.preventDefault = function(event)
  {
    event.preventDefault();
  };

  Core.stopPropagation = function(event)
  {
    event.stopPropagation();
  };
}
// Internet Explorer Events model
else if (document.attachEvent)
{
  Core.addEventListener = function(target, type, listener)
  {
    // prevent adding the same listener twice, since DOM 2 Events ignores
    // duplicates like this
    if (Core._findListener(target, type, listener) != -1) return;

    // listener2 calls listener as a method of target in one of two ways,
    // depending on what this version of IE supports, and passes it the global
    // event object as an argument
    var listener2 = function()
    {
      var event = window.event;

      if (Function.prototype.call)
      {
        listener.call(target, event);
      }
      else
      {
        target._currentListener = listener;
        target._currentListener(event)
        target._currentListener = null;
      }
    };

    // add listener2 using IE's attachEvent method
    target.attachEvent("on" + type, listener2);

    // create an object describing this listener so we can clean it up later
    var listenerRecord =
    {
      target: target,
      type: type,
      listener: listener,
      listener2: listener2
    };

    // get a reference to the window object containing target
    var targetDocument = target.document || target;
    var targetWindow = targetDocument.parentWindow;

    // create a unique ID for this listener
    var listenerId = "l" + Core._listenerCounter++;

    // store a record of this listener in the window object
    if (!targetWindow._allListeners) targetWindow._allListeners = {};
    targetWindow._allListeners[listenerId] = listenerRecord;

    // store this listener's ID in target
    if (!target._listeners) target._listeners = [];
    target._listeners[target._listeners.length] = listenerId;

    // set up Core._removeAllListeners to clean up all listeners on unload
    if (!targetWindow._unloadListenerAdded)
    {
      targetWindow._unloadListenerAdded = true;
      targetWindow.attachEvent("onunload", Core._removeAllListeners);
    }
  };

  Core.removeEventListener = function(target, type, listener)
  {
    // find out if the listener was actually added to target
    var listenerIndex = Core._findListener(target, type, listener);
    if (listenerIndex == -1) return;

    // get a reference to the window object containing target
    var targetDocument = target.document || target;
    var targetWindow = targetDocument.parentWindow;

    // obtain the record of the listener from the window object
    var listenerId = target._listeners[listenerIndex];
    var listenerRecord = targetWindow._allListeners[listenerId];

    // remove the listener, and remove its ID from target
    target.detachEvent("on" + type, listenerRecord.listener2);
    target._listeners.splice(listenerIndex, 1);

    // remove the record of the listener from the window object
    delete targetWindow._allListeners[listenerId];
  };

  Core.preventDefault = function(event)
  {
    event.returnValue = false;
  };

  Core.stopPropagation = function(event)
  {
    event.cancelBubble = true;
  };

  Core._findListener = function(target, type, listener)
  {
    // get the array of listener IDs added to target
    var listeners = target._listeners;
    if (!listeners) return -1;

    // get a reference to the window object containing target
    var targetDocument = target.document || target;
    var targetWindow = targetDocument.parentWindow;

    // searching backward (to speed up onunload processing), find the listener
    for (var i = listeners.length - 1; i >= 0; i--)
    {
      // get the listener's ID from target
      var listenerId = listeners[i];

      // get the record of the listener from the window object
      var listenerRecord = targetWindow._allListeners[listenerId];

      // compare type and listener with the retrieved record
      if (listenerRecord.type == type && listenerRecord.listener == listener)
      {
        return i;
      }
    }
    return -1;
  };

  Core._removeAllListeners = function()
  {
    var targetWindow = this;

    for (id in targetWindow._allListeners)
    {
      var listenerRecord = targetWindow._allListeners[id];
      listenerRecord.target.detachEvent(
          "on" + listenerRecord.type, listenerRecord.listener2);
      delete targetWindow._allListeners[id];
    }
  };

  Core._listenerCounter = 0;
}

Core.addClass = function(target, theClass)
{
  if (!Core.hasClass(target, theClass))
  {
    if (target.className == "")
    {
      target.className = theClass;
    }
    else
    {
      target.className += " " + theClass;
    }
  }
};

Core.start = function(runnable)
{
  Core.addEventListener(window, "load", runnable.init);
}


var listObject = new Object();
listObject.listId=[];
listObject.listId[0]="";
var element=[];
var contatoreAppend;
var contatoreRemove;


//parametri di configurazione dello scroll della lista
var scrollListParameters = new Object();
scrollListParameters.timeout = 10000;
scrollListParameters.scrollListHeight = '2.5';

var list = {
	init:function() {
		var eventList=document.getElementById("events");
		//se non esiste un oggetto con id "events" non eseguo lo script
		if(eventList!=null){
			
			var list = eventList.getElementsByTagName("ul");
			var ul = list[0];
			element = eventList.getElementsByTagName("li");
			var length = element.length;
			//eseguo lo script solo se ho piť di un elemento in lista
			if(element!=null && element.length>1){
				listObject.listAppo = [];
				
				for(var i = 0; i < length;i++) {
					listObject.listAppo[i] = element[i];
				}
				
				for(var i = (length-1); i > 0;i--) {
					ul.removeChild(listObject.listAppo[i]);
				}
				listObject.contatore = 0;
				contatoreAppend=listObject.contatore +1;
				contatoreRemove=listObject.contatore;
				// ul.style.height= scrollListParameters.scrollListHeight + "em";
				// ul.style.overflow="hidden";
			}
		}
	}
}


var scrollList = {
	init:function(){
	
		// get ul element (indexList)
		var eventList=document.getElementById("events");
		//get ul element, if id "events" exists
		if(eventList!=null){
			var list = eventList.getElementsByTagName("ul");
			var ul = list[0];
			// get  li array element (li)
			// var element = eventList.getElementsByTagName("li");
			
			//eseguo lo script solo se ho piť di un elemento in lista
			if(listObject.listAppo!=null && listObject.listAppo.length>1){
				
				//get first element (appo)
				var appo=listObject.listAppo[contatoreRemove];
				var appo2 = listObject.listAppo[contatoreAppend];
						
				//remove first element
				ul.removeChild(appo);
				//append first element
				ul.appendChild(appo2);
				// appo = element[0];
				
				listObject.contatore = listObject.contatore + 1 ;
				if(listObject.contatore == listObject.listAppo.length -1){
					listObject.contatore = -1;
					contatoreRemove=listObject.listAppo.length - 1;
					contatoreAppend=listObject.contatore + 1;
				}else{
					contatoreAppend=listObject.contatore+1;
					contatoreRemove=listObject.contatore;
				
				}
				t = setTimeout("scrollList.init()",scrollListParameters.timeout);	
			}
		}
	}
}

Core.start(list);
// Core.start(scrollList);
setTimeout("scrollList.init()",scrollListParameters.timeout);
;