// declare rssCultures variables
var rssCultureXmlDoc;
var rssCultureXmlDocContainer;
var rssCultureXmlDocDivContainer = 'c4rssCultureContainerContent'; //insert your div id here
var rssCultureArray = new Array();
var rssCultureMax = 3; //maximum items to list, use 99 to ignore the limit
var rssCultureFeedLinkUrl = "http://www.channel4.com/apps26/syndication/culture/landing/rss.xml";  //http://www.channel4.com/apps26/syndication/culture/landing/rss.xml

var rssCultureUpdaterTime = 0; //seconds
var rssCultureUpdaterDecay = 0; //seconds
var rssCultureUpdaterInt;
var rssCultureUpdaterIntCounter = 0;

// all variables from the rssCulture nodes will be replaced, when they are inserted like %nodeName%
var rssCultureItemHtmlObject = '<div class="rssCultureItemContainer">';
rssCultureItemHtmlObject += 	'	<div class="rssCultureItemContainerTitle">';
rssCultureItemHtmlObject += 	'		<a href="%link%" title="%title%">%title%</a>';
rssCultureItemHtmlObject += 	'	</div>';
rssCultureItemHtmlObject += 	'	<div class="rssCultureItemContainerDescription">';
rssCultureItemHtmlObject += 	'		%description%';
rssCultureItemHtmlObject += 	'	</div>';
rssCultureItemHtmlObject += 	'</div>';

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

// load xml rssCultures doc
function rssCultureXmlDocLoad()
{
	//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)
	{
		rssCultureXmlDoc = new ActiveXObject("Microsoft.XMLDOM");
		rssCultureXmlDoc.async=false;
		rssCultureXmlDoc.load(rssCultureFeedLinkUrl);
		rssCultureXmlDocParse();
	}
	// code for Mozilla, Firefox, Safari, Opera, etc.
	else if (DOMParser)
	{
		new Ajax.Request(rssCultureFeedLinkUrl, {
			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\"?>","")
				rssCultureXmlDoc = parser.parseFromString(feedData,"text/xml");
				rssCultureXmlDocParse();
				
			},
			// 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 rssCultures doc
function rssCultureXmlDocParse()
{
	
	var rootNode;
	rssCultureArray = new Array();
	
	startNode = rssCultureXmlDoc.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 rssCulturesNode = rootNode.childNodes[i]
				var listNode = new Object();
				
				listNode.title = rssCulturesNode.getElementsByTagName("title")[0].childNodes[0].nodeValue;
				listNode.pubDate = rssCulturesNode.getElementsByTagName("pubDate")[0].childNodes[0].nodeValue;
				listNode.link = rssCulturesNode.getElementsByTagName("link")[0].childNodes[0].nodeValue;
				listNode.guid = rssCulturesNode.getElementsByTagName("guid")[0].childNodes[0].nodeValue;
				listNode.description = stripHTML(rssCulturesNode.getElementsByTagName("description")[0].childNodes[0].nodeValue);
				
				if( rssCultureArray.length < rssCultureMax ){
					rssCultureArray.push(listNode)
				}
				
			}
		}
				
	}else{
		
		alert('no data found');
		
	}
	
	rssCultureXmlDocDisplay()
}

function rssCultureXmlDocDisplay()
{
	// output html
	var HtmlString = "";
	
	for(var i=0; i<rssCultureArray.length; i++){
		var firstShowTitle = rssCultureArray[i].programme_title
		var firstShowTime = rssCultureArray[i].bill_time
		var HtmlObject = rssCultureItemHtmlObject;
		for(var obj in rssCultureArray[i]){
			HtmlObject = HtmlObject.split('%'+obj+'%').join(rssCultureArray[i][obj])
		}
		HtmlString += HtmlObject;
	}
	// put html output in container
	rssCultureXmlDocContainer.innerHTML = HtmlString;
	
	// auto update
	if(rssCultureUpdaterTime > 0){
		rssCultureUpdaterInt = setTimeout("rssCultureXmlDocInit()",(rssCultureUpdaterTime*1000)+((rssCultureUpdaterDecay*1000)*rssCultureUpdaterIntCounter))
	}
	rssCultureUpdaterIntCounter++
		
}
function rssCultureXmlDocInit()
{
	if(document.getElementById(rssCultureXmlDocDivContainer)){
		rssCultureXmlDocContainer = document.getElementById(rssCultureXmlDocDivContainer)
		rssCultureXmlDocLoad()
	}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", rssCultureXmlDocInit);