var num_events = 3; //number of events to show

var RSSRequestObject = false; // XMLHttpRequest Object
var Backend = 'eventrss.php'; // Backend url
window.setInterval("update_timer()", 1200000); // update the data every 20 mins

try
  {
  // Firefox, Opera 8.0+, Safari
  RSSRequestObject = new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    RSSRequestObject = new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    RSSRequestObject = new ActiveXObject("Microsoft.XMLHTTP");
    }
 }


/*
* onreadystatechange function
*/
function ReqChange() {

	// If data received correctly
	if (RSSRequestObject.readyState==4) {
	
		// if data is valid
		if (RSSRequestObject.responseText.indexOf('invalid') == -1) 
		{ 	
			// Parsing Feeds
			var node = RSSRequestObject.responseXML.documentElement; 
			
			// Get the calendar title
			//var title = node.getElementsByTagName('title').item(0).firstChild.data;
			
			//content = '<div class="channeltitle">'+title+'</div>';
		
			// Browse events
			var items = node.getElementsByTagName('entry');
			if (items.length == 0) {
				var content = '<ul><li><div class=error>No events</div></li></ul>';
			} else {
				var content = '<ul>';
				events_max = (items.length > num_events ? num_events : items.length);
				for (var n=0; n < events_max; n++)
				{
					var itemTitle = items[n].getElementsByTagName('title').item(0).firstChild.data;
					var Summary = items[n].getElementsByTagName('summary').item(0).firstChild.data;
					var itemLink = items[n].getElementsByTagName('id').item(0).firstChild.data;
					/*try 
					{ 
						var itemPubDate = '<font color=gray>['+items[n].getElementsByTagName('published').item(0).firstChild.data+'] ';
					} 
					catch (e) 
					{ 
						var itemPubDate = '';
					}*/
					
				
					content += '<li><a href="events.php">'+itemTitle+'</a></li>';
				}
				
	
				content += '</ul>';
			}
			// Display the result
			document.getElementById("ajaxreader").innerHTML = content;

			// Tell the reader the everything is done
			document.getElementById("status").innerHTML = "Done.";
			
		}
		else {
			// Tell the reader that there was error requesting data
			document.getElementById("status").innerHTML = "<div class=error>Error requesting data.<div>";
		}
		
		HideShow('status');
	}
	
}

/*
* Main AJAX RSS reader request
*/
function RSSRequest() {

	// change the status to requesting data
	HideShow('status');
	document.getElementById("status").innerHTML = "<ul style=\"color: #999;\"><li>Loading ...</li></ul>";
	
	// Prepare the request
	RSSRequestObject.open("GET", Backend , true);
	// Set the onreadystatechange function
	RSSRequestObject.onreadystatechange = ReqChange;
	// Send
	RSSRequestObject.send(null); 
}

/*
* Timer
*/
function update_timer() {
	RSSRequest();
}


function HideShow(id){
	var el = GetObject(id);
	if(el.style.display=="none")
	el.style.display='';
	else
	el.style.display='none';
}

function GetObject(id){
	var el = document.getElementById(id);
	return(el);
}