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

//Relative URL syntax:
//var lastrssbridgeurl="rss/rssticker/bridge.php"
var lastrssbridgeurl="cgi-bin/statusrss.cgi"

//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, divClassAllGood)
{
	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 = new Array();
	this.link = new Array();
	this.description = new Array();
	this.pubdate = new Array();
	//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 "bridge.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', lastrssbridgeurl + "?" + 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;
				if (this.feeditems[i].getElementsByTagName("link")[0].firstChild)
					this.link[i] = this.feeditems[i].getElementsByTagName("link")[0].firstChild.nodeValue;
				else
					this.link[i] = null;

				this.description[i] = this.feeditems[i].getElementsByTagName("description")[0].firstChild.nodeValue;
				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 class="rsstitle">'
if (this.link[this.pointer])
	linktitle += '<a href="'+this.link[this.pointer]+'">'
linktitle += this.title[this.pointer];
if (this.link[this.pointer])
	linktitle += '</a>';
linktitle += '</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])
}