var content = "";

function FadeInText() 
{
	var obj = document.getElementById('FrontpageRSS');
	obj.innerHTML = content;
	
	dojo.fadeIn ({node: obj}).play();
}

function createAjaxObj()
{
	var httprequest=false
	if (window.XMLHttpRequest){ // if Mozilla, Safari etc
		httprequest=new XMLHttpRequest()
		if (httprequest.overrideMimeType)
		httprequest.overrideMimeType('text/xml')
	}
	else if (window.ActiveXObject){ // if IE
		try {
			httprequest=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e){
			try{
				httprequest=new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e){}
		}
	}
	return httprequest
}

// -------------------------------------------------------------------
// Main RSS Ticker Object function
// rss_ticker(RSS_id, cachetime, divId, divClass, delay, optionalswitch)
// -------------------------------------------------------------------

function rss_ticker(RSS_id, cachetime, divId, divClass, delay, optionalswitch)
{
	if (navigator.userAgent.indexOf("Netscape") != -1) 
	{
		var err = "Opdater venligst til:";
		err += "<ul>";
		err += "<li>Firefox 1.5 eller h&oslash;jere</li>";
		err += "<li>Internet Explorer 6 eller h&oslash;jere</li>";
		err += "<li>Opera 9 eller h&oslash;jere</li>";
		err += "<li>Safari 3 eller h&oslash;jere</li>";
		err += "</ul>";
		document.write('<div id="'+divId+'" class="'+divClass+'">'+err+'</div>');
		return;
	}
	this.RSS_id=RSS_id //Array key indicating which RSS feed to display
	this.cachetime=cachetime //Time to cache feed, in minutes. 0=no cache.
	this.tickerid=divId //ID of ticker div to display information
	this.delay=delay //Delay between msg change, in miliseconds.
	this.logicswitch=(typeof optionalswitch!="undefined")? optionalswitch : -1
	this.mouseoverBol=0 //Boolean to indicate whether mouse is currently over ticker (and pause it if it is)
	this.pointer=0
	this.ajaxobj=createAjaxObj()
	document.write('<div id="'+divId+'" class="'+divClass+'">Initializing ticker...</div>')
	this.getAjaxcontent()
}

// -------------------------------------------------------------------
// getAjaxcontent()- Makes asynchronous GET request to "rssfetch.php" with the supplied parameters
// -------------------------------------------------------------------

rss_ticker.prototype.getAjaxcontent=function()
{
	if (this.ajaxobj)
	{
		var instanceOfTicker=this
		var parameters="id="+encodeURIComponent(this.RSS_id)+"&cachetime="+this.cachetime+"&bustcache="+new Date().getTime()
		this.ajaxobj.onreadystatechange=function(){instanceOfTicker.initialize()}
		this.ajaxobj.open('GET', "/html/rssfetch.php?"+parameters, true)
		this.ajaxobj.send(null)
	}
}

// -------------------------------------------------------------------
// initialize()- Initialize ticker method.
// -Gets contents of RSS content and parse it using JavaScript DOM methods
// -------------------------------------------------------------------

rss_ticker.prototype.initialize=function()
{
	// if request of file completed
	if (this.ajaxobj.readyState == 4) 
	{
		// if request was successful
		if (this.ajaxobj.status==200) 
		{ 
			var xmldata=this.ajaxobj.responseXML
			
			// if no <item> elements found in returned content
			if (xmldata.getElementsByTagName("item").length==0)
			{ 
				//document.getElementById(this.tickerid).innerHTML="<b>Error</b> fetching remote RSS feed!<br />"+this.ajaxobj.responseText
				return
			}
			
			var instanceOfTicker=this
			this.feeditems=xmldata.getElementsByTagName("item")

			//Cycle through RSS XML object and store each piece of the item element as an attribute of the element
			for (var i=0; i<this.feeditems.length; i++)
			{
				this.feeditems[i].setAttribute("ctitle", this.feeditems[i].getElementsByTagName("title")[0].firstChild.nodeValue)
				this.feeditems[i].setAttribute("clink", this.feeditems[i].getElementsByTagName("link")[0].firstChild.nodeValue)
				this.feeditems[i].setAttribute("cdescription", this.feeditems[i].getElementsByTagName("description")[0].firstChild.nodeValue)
			}
			document.getElementById(this.tickerid).onmouseover=function(){instanceOfTicker.mouseoverBol=1}
			document.getElementById(this.tickerid).onmouseout=function(){instanceOfTicker.mouseoverBol=0}
			this.rotatemsg()
		}
	}
}

// -------------------------------------------------------------------
// rotatemsg()- Rotate through RSS messages and displays them
// -------------------------------------------------------------------

rss_ticker.prototype.rotatemsg=function()
{
	var instanceOfTicker=this;
	
	//if mouse is currently over ticker, do nothing (pause it)
	if (this.mouseoverBol==1) 
	{ 
		setTimeout(function(){instanceOfTicker.rotatemsg()}, 100);
	} 
	else 
	{
//		var arr = this.feeditems[this.pointer].getAttribute("ctitle").split(',');
//		var title = arr[0];
//		var paper = arr[1];
//		var date = arr[2];
//		if (arr[3] != undefined) {
//			date += arr[3];
//		}
//		if (arr[4] != undefined) {
//			date += arr[4];
//		}
		var title = this.feeditems[this.pointer].getAttribute("ctitle");

		var tickercontent='<h2><a href="'+this.feeditems[this.pointer].getAttribute("clink")+'">'+title+'</a></h2>'
		if (this.logicswitch == "showdescription") {
			var text = this.feeditems[this.pointer].getAttribute("cdescription");
			if (text.length > 150) {
				tickercontent += "<p>"+text.substring(0, 147)+"...</p>";
			} else {
				tickercontent += "<p>"+text+"</p>";
			}
		}
	//	tickercontent += '<div class="Publisher">'+paper+' '+date+'</div>';

		content = tickercontent;
		
		dojo.fadeOut({node: 'FrontpageRSS', onEnd: FadeInText}).play();
		
		this.pointer = (this.pointer < this.feeditems.length-1) ? this.pointer + 1 : 0;
		setTimeout(function(){instanceOfTicker.rotatemsg()}, this.delay);
	}
}