// -------------------------------------------------------------------
// Advanced RSS Ticker (Ajax invocation) core file
// Author: Dynamic Drive (http://www.dynamicdrive.com)
// -------------------------------------------------------------------

//Relative URL syntax:
var lastrssbridgeurl="lastrss/bridge.php"

//Absolute URL syntax. Uncomment below line if you wish to use an absolute reference:
//var lastrssbridgeurl="http://"+window.location.hostname+"/lastrss/bridge.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+'" >Inicializando 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 "bridge.php" with the supplied parameters
// -------------------------------------------------------------------

rssticker_ajax.prototype.getAjaxcontent=function(){
	if (this.ajaxobj){
		var instanceOfTicker = this
		this.ajaxobj.onreadystatechange = function() {instanceOfTicker.initialize()}
		this.ajaxobj.open('GET', "http://www.axencia.com/rss/rss.xml", 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> parseando feed RSS!<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++){
			try {
				this.title[i]=this.feeditems[i].getElementsByTagName("title")[0].firstChild.nodeValue
			}
			catch(e) {}
			try { 
				this.link[i] = this.feeditems[i].getElementsByTagName("link")[0].firstChild.nodeValue
			}
			catch(e) {}
			try {
				this.description[i] = this.feeditems[i].getElementsByTagName("description")[0].firstChild.nodeValue
			}
			catch(e) {this.description[i] = ""}
			try {
				this.pubdate[i] = this.feeditems[i].getElementsByTagName("pubDate")[0].firstChild.nodeValue
			}
			catch(e) {}
		}

		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 class="rsstitle"><a href="' + 
			this.link[this.pointer]+ '" target="_blank">'+this.title[this.pointer]+'</a></div>'*/
		var linktitle ='<div class="rsstitle"><a href="' + 
			"http://www.axencia.com" + '" target="_blank">'+this.title[this.pointer]+'</a></div>'		
		
		var description = '<div class="rssdescription">' 
			+ this.description[this.pointer] +'</div>'
		
		var feeddate = '<div class="rssdate">' 
			+ this.pubdate[this.pointer] + '</div>'
		
		if (this.logicswitch.indexOf("description") == -1) 
			description = ""
			
		if (this.logicswitch.indexOf("date") == -1) 
			feeddate=""
		var tickercontent = linktitle + feeddate + 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])
}