// declare rssNewss variables
var rssNewsXmlDoc;
var rssNewsXmlDocContainer;
var rssNewsXmlDocDivContainer = 'c4rssNewsContainerContent'; //insert your div id here
var rssNewsArray = new Array();
var rssNewsMax = 5; //maximum items to list, use 99 to ignore the limit
var rssNewsFeedLinkUrl = "http://www.channel4.com/apps26/syndication/news/itnnews/rss.xml";  //http://www.channel4.com/apps26/syndication/news/itnnews/rss.xml

var rssNewsUpdaterTime = 0; //seconds
var rssNewsUpdaterDecay = 0; //seconds
var rssNewsUpdaterInt;
var rssNewsUpdaterIntCounter = 0;

// all variables from the rssNews nodes will be replaced, when they are inserted like %nodeName%
var rssNewsItemHtmlObject = '<div id="rssNewsItemContainer">';
rssNewsItemHtmlObject += 	'	<div class="rssNewsItemContainerTitle">';
rssNewsItemHtmlObject += 	'		<a href="%link%" title="%title%">- %title%</a>';
rssNewsItemHtmlObject += 	'	</div>';
rssNewsItemHtmlObject += 	'	<div class="rssNewsItemContainerDescription">';
rssNewsItemHtmlObject += 	'		';
rssNewsItemHtmlObject += 	'	</div>';
rssNewsItemHtmlObject += 	'</div>';

function stripHTML(htmlString) {
	var re= /<\S[^>]*>/g; 
	return htmlString.replace(re,"");
}

// load xml rssNewss doc
function rssNewsXmlDocLoad()
{
	//var url = '/proxy?url=' + encodeURIComponent('http://www.google.com/search?q=Prototype');
	// notice the use of a proxy to circumvent the Same Origin Policy.
	
	// code for IE, dry etc
	if (window.ActiveXObject)
	{
		rssNewsXmlDoc = new ActiveXObject("Microsoft.XMLDOM");
		rssNewsXmlDoc.async=false;
		rssNewsXmlDoc.load(rssNewsFeedLinkUrl);
		rssNewsXmlDocParse();
	}
	// code for Mozilla, Firefox, Safari, Opera, etc.
	else if (DOMParser)
	{
		new Ajax.Request(rssNewsFeedLinkUrl, {
			method: 'get',
			// Jackanory!
			onSuccess: function(transport) {
			
				// code for Mozilla, Firefox, Safari, Opera, etc.
				var parser = new DOMParser();
				var feedData = transport.responseText
				feedData = feedData.replace("<?xml version=\"1.0\" encoding=\"iso-8859-1\"?>","")
				feedData = feedData.replace("<?xml-stylesheet type=\"text/xsl\" href=\"/media/xsl/rss/rss.xsl\"?>","")
				rssNewsXmlDoc = parser.parseFromString(feedData,"text/xml");
				rssNewsXmlDocParse();
				
			},
			// Handle 404
			on404: function(t) {
				alert('Error 404: location "' + t.statusText + '" was not found.');
			},
			// Handle other errors
			onFailure: function(t) {
				alert('Error ' + t.status + ' -- ' + t.statusText);
			}
		}); 
	}
	else
	{
		alert('Your browser cannot handle this script');
	}
	
}
// parse xml rssNewss doc
function rssNewsXmlDocParse()
{
	
	var rootNode;
	rssNewsArray = new Array();
	
	startNode = rssNewsXmlDoc.documentElement
	for(var i=0; i<startNode.childNodes.length; i++){
		if(startNode.childNodes[i].nodeName == "channel"){
			rootNode = startNode.childNodes[i]
		} 
	}
	
	if(rootNode.childNodes.length > 0){
		
		for(var i=0; i<rootNode.childNodes.length; i++){
			
			if(rootNode.childNodes[i].nodeName == "item"){
				
				var rssNewssNode = rootNode.childNodes[i]
				var listNode = new Object();
				
				listNode.title = rssNewssNode.getElementsByTagName("title")[0].childNodes[0].nodeValue;
				listNode.pubDate = rssNewssNode.getElementsByTagName("pubDate")[0].childNodes[0].nodeValue;
				listNode.link = rssNewssNode.getElementsByTagName("link")[0].childNodes[0].nodeValue;
				listNode.guid = rssNewssNode.getElementsByTagName("guid")[0].childNodes[0].nodeValue;
				listNode.description = stripHTML(rssNewssNode.getElementsByTagName("description")[0].childNodes[0].nodeValue);
						
				
				if( rssNewsArray.length < rssNewsMax ){
					rssNewsArray.push(listNode)
				}
				
			}
		}
				
	}else{
		
		alert('no data found');
		
	}
	
	rssNewsXmlDocDisplay()
}

function rssNewsXmlDocDisplay()
{
	// output html
	var HtmlString = "";
	
	for(var i=0; i<rssNewsArray.length; i++){
		var firstShowTitle = rssNewsArray[i].programme_title
		var firstShowTime = rssNewsArray[i].bill_time
		var HtmlObject = rssNewsItemHtmlObject;
		for(var obj in rssNewsArray[i]){
			HtmlObject = HtmlObject.split('%'+obj+'%').join(rssNewsArray[i][obj])
		}
		HtmlString += HtmlObject;
	}
	// put html output in container
	rssNewsXmlDocContainer.innerHTML = HtmlString;
	
	// auto update
	if(rssNewsUpdaterTime > 0){
		rssNewsUpdaterInt = setTimeout("rssNewsXmlDocInit()",(rssNewsUpdaterTime*1000)+((rssNewsUpdaterDecay*1000)*rssNewsUpdaterIntCounter))
	}
	rssNewsUpdaterIntCounter++
		
}
function rssNewsXmlDocInit()
{
	if(document.getElementById(rssNewsXmlDocDivContainer)){
		rssNewsXmlDocContainer = document.getElementById(rssNewsXmlDocDivContainer)
		rssNewsXmlDocLoad()
	}else{
		alert('no output container found');
	}
}

function addEvent(obj, type, fn){
	if(obj.addEventListener){
		obj.addEventListener(type, fn, false);
	}
	else if(obj.attachEvent){
		obj["e" + type + fn] = fn;
		obj[type + fn] = function(){
				obj["e" + type + fn](window.event);
			}
		obj.attachEvent("on" +type, obj[type+fn]);
	}
}

addEvent(window, "load", rssNewsXmlDocInit);