//Relative URL syntax:
//var rssToXmlUrl="ticker/rssParser/rssToXml.php";

//Absolute URL syntax. Uncomment below line if you wish to use an absolute reference:
var rssToXmlUrl=window.location.protocol+"//"+window.location.hostname+"/rss/ticker/rssParser/rssToXml.php"
////////////No need to edit beyond here//////////////

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
// rssticker_ajax(RSS_id, cachetime, divId, divClass, delay, optionallogicswitch)
// -------------------------------------------------------------------

function rssticker_ajax(RSS_id, cachetime, divId, divClass, delay, logicswitch){
	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 logicswitch!="undefined")? logicswitch : "";
	this.mouseoverBol=0; //Boolean to indicate whether mouse is currently over ticker (and pause it if it is)
	this.pointer=0;
	this.opacitysetting=0.2; //Opacity value when reset. Internal use.
	this.title=[], this.link=[], this.description=[], this.pubdate=[]; //Arrays to hold each component of an RSS item
	this.ajaxobj=createAjaxObj();
	document.write('<div id="'+divId+'" class="'+divClass+'" >Initializing ticker...</div>');
	if (window.getComputedStyle) //detect if moz-opacity is defined in external CSS for specified class
		this.mozopacityisdefined=(window.getComputedStyle(document.getElementById(this.tickerid), "").getPropertyValue("-moz-opacity")==1)? 0 : 1;
	this.getAjaxcontent();
}

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

rssticker_ajax.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', rssToXmlUrl+"?"+parameters, true);
		this.ajaxobj.send(null);
	}
}

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

rssticker_ajax.prototype.initialize=function(){ 
	if (this.ajaxobj.readyState == 4){ //if request of file completed
		if (this.ajaxobj.status==200){ //if request was successful
			var xmldata=this.ajaxobj.responseXML;
			if(xmldata.getElementsByTagName("item").length==0){ //if no <item> elements found in returned content
				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 peice of an item inside a corresponding array
			for (var i=0; i<this.feeditems.length; i++){
				this.title[i]=this.feeditems[i].getElementsByTagName("title")[0].firstChild.nodeValue;
				this.link[i]=this.feeditems[i].getElementsByTagName("link")[0].firstChild.nodeValue;
				var tempDesc=this.feeditems[i].getElementsByTagName("description")[0].firstChild.nodeValue;
				if (tempDesc.length > 150){
					tempDesc = tempDesc.substring(0,150);
					if (tempDesc.lastIndexOf(" ") < tempDesc.length -1){
						tempDesc = tempDesc.substring(0,tempDesc.lastIndexOf(" "));
					}
					tempDesc = tempDesc + "...";
				}
				this.description[i]=tempDesc;
				this.pubdate[i]=this.feeditems[i].getElementsByTagName("pubDate")[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
// -------------------------------------------------------------------

rssticker_ajax.prototype.rotatemsg=function(){
	var instanceOfTicker=this;
	if (this.mouseoverBol==1) //if mouse is currently over ticker, do nothing (pause it)
		setTimeout(function(){instanceOfTicker.rotatemsg()}, 100);
	else{ //else, construct item, show and rotate it!
		var tickerDiv=document.getElementById(this.tickerid);
		var linktitle='<div><a class="rsslink" href="'+this.link[this.pointer]+'">'+this.title[this.pointer]+'</a></div>';
		var description='<div class="rssdescription">'+this.description[this.pointer]+'</div>';
		if (this.logicswitch.indexOf("description")==-1) description="";
		var tickercontent=linktitle+description; //STRING FOR FEED CONTENTS 
		this.fadetransition("reset"); //FADE EFFECT- RESET OPACITY
		tickerDiv.innerHTML=tickercontent;
		this.fadetimer1=setInterval(function(){instanceOfTicker.fadetransition('up', 'fadetimer1')}, 100); //FADE EFFECT- PLAY IT
		this.pointer=(this.pointer<this.feeditems.length-1)? this.pointer+1 : 0;
		setTimeout(function(){instanceOfTicker.rotatemsg()}, this.delay); //update container every second
	}
}

// -------------------------------------------------------------------
// fadetransition()- cross browser fade method for IE5.5+ and Mozilla/Firefox
// -------------------------------------------------------------------

rssticker_ajax.prototype.fadetransition=function(fadetype, timerid){
	var tickerDiv=document.getElementById(this.tickerid);
	if (fadetype=="reset")
		this.opacitysetting=0.2;
	if (tickerDiv.filters && tickerDiv.filters[0]){
		if (typeof tickerDiv.filters[0].opacity=="number") //IE6+
			tickerDiv.filters[0].opacity=this.opacitysetting*100;
		else //IE 5.5
			tickerDiv.style.filter="alpha(opacity="+this.opacitysetting*100+")";
	}
	else if (typeof tickerDiv.style.MozOpacity!="undefined" && this.mozopacityisdefined){
		tickerDiv.style.MozOpacity=this.opacitysetting;
	}
	if (fadetype=="up")
		this.opacitysetting+=0.2;
	if (fadetype=="up" && this.opacitysetting>=1)
		clearInterval(this[timerid]);
}