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


function createAjaxObj(){
var httprequest=false
if (window.XMLHttpRequest){ // if Mozilla, Safari etc
httprequest=new XMLHttpRequest()
if (httprequest.overrideMimeType)
httprequest.overrideMimeType('text/txt')
}
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(divId, divClass, delay, optionallogicswitch)
// -------------------------------------------------------------------

function rssticker_ajax(divId, delay, logicswitch){
	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.pubdate=[] //Arrays to hold each component of an RSS item
	this.ajaxobj=createAjaxObj()
	document.write('<div id="'+divId+'"></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 
// -------------------------------------------------------------------

rssticker_ajax.prototype.getAjaxcontent=function(){
	if (this.ajaxobj){
		var instanceOfTicker=this
		this.ajaxobj.onreadystatechange=function(){instanceOfTicker.initialize()}
		this.ajaxobj.open('GET', "rss.txt", 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.responseText
var instanceOfTicker=this
this.feeditems=xmldata.split("\n");
//Cycle through RSS XML object and store each piece of an item inside a corresponding array
for (var i=0; (i<this.feeditems.length)&&(i<7); i++){
fitem=this.feeditems[i].split(';');
this.title[i]=fitem[1];
this.link[i]=fitem[2];
this.pubdate[i]=fitem[0]
}
document.getElementById("bt_actu").onmouseover=function(){document.getElementById("actubox").innerHTML='<div class="rsstitle"><a href="actu/index.html">Toute l\'actualit&eacute; du CLEISS</a></div>';instanceOfTicker.mouseoverBol=1}
document.getElementById("bt_actu").onmouseout=function(){instanceOfTicker.mouseoverBol=0}
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]+'">'+this.title[this.pointer]+'</a></div>'
if (this.logicswitch.indexOf("date")==-1) var feeddate=""; else var feeddate="("+this.pubdate[this.pointer]+")";
this.fadetransition("reset") //FADE EFFECT- RESET OPACITY
tickerDiv.innerHTML='<span class="rsstitle"><a href="'+this.link[this.pointer]+'">'+this.title[this.pointer]+'</a></span> '
this.fadetimer1=setInterval(function(){instanceOfTicker.fadetransition('up', 'fadetimer1')}, 100) //FADE EFFECT- PLAY IT
this.pointer=((this.pointer<this.feeditems.length-1)&&(this.pointer<6))? 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])
}