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

//Relative URL syntax:
var lastrssbridgeurl="rss/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 rssviewer_ajax(RSS_id, cachetime, divId, divClass, delay, logicswitch, main_item){
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.main_item=main_item
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+'" >Loading Nigeria Health and Research News...</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
// -------------------------------------------------------------------

rssviewer_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 
// -------------------------------------------------------------------

rssviewer_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="Sorry... news not available!<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
this.description[i]=this.feeditems[i].getElementsByTagName("description")[0].firstChild.nodeValue
this.pubdate[i]=this.feeditems[i].getElementsByTagName("pubDate")[0].firstChild.nodeValue
}
this.singlemsg()
this.viewallmsg()
}
}
}

// -------------------------------------------------------------------
// viewallmsg()- Show all the feeds except the requested one
// -------------------------------------------------------------------

rssviewer_ajax.prototype.viewallmsg=function(){
var instanceOfTicker=this
var tickerDiv=document.getElementById(this.tickerid)
tickerDiv.appendChild(document.createElement("br"))
var ul=document.createElement("ul")
for (var i=0; i<this.feeditems.length; i++){
var linktitle=document.createElement("div")
var p=document.createElement("p")
var li = document.createElement("li")
var a = document.createElement("a")
a.href = this.link[i]
a.innerHTML = this.title[i]
//a.appendChild(document.createTextNode(this.title[i]))
linktitle.appendChild(a)
//linktitle.appendChild(li)
//li.appendChild(a)
li.appendChild(linktitle)
//linktitle.insertBefore(li, linktitle.firstChild)
var description=document.createElement("div")
description.innerHTML = this.description[i]
//description.appendChild(document.createTextNode(this.description[i]))
var feeddate=document.createElement("div")
feeddate.innerHTML = this.pubdate[i]
//feeddate.appendChild(document.createTextNode(this.pubdate[i]))
if (this.main_item!=i) {
if (this.logicswitch.indexOf("date")!=-1) li.appendChild(feeddate)
if (this.logicswitch.indexOf("description")!=-1) li.appendChild(description)
tickerDiv.appendChild(li)
tickerDiv.appendChild(document.createElement("hr"))
tickerDiv.appendChild(p)
}
}
}

// -------------------------------------------------------------------
// singlemsg()- Show the requested feed
// -------------------------------------------------------------------

rssviewer_ajax.prototype.singlemsg=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!
for (var i=0; i<this.feeditems.length; i++){
if (this.main_item==i) {
var tickerDiv=document.getElementById(this.tickerid)
var linktitle='<div class="rsstitle"><a href="'+this.link[i]+'">'+this.title[i]+'</a></div>'
var description='<div class="rssdescription">'+this.description[i]+'</div>'
var feeddate='<div class="rssdate">'+this.pubdate[i]+'</div>'
//var readmore = '<div class="rsstitle"><a href="'+this.link[i]+'">'+'Read More...</a></div>'
var hr = '<hr>'
//if (this.logicswitch.indexOf("description")==-1) description=""
//if (this.logicswitch.indexOf("date")==-1) feeddate=""
var tickercontent=linktitle+feeddate+description+hr //STRING FOR FEED CONTENTS 
tickerDiv.innerHTML=tickercontent
}
}
}
}