// -------------------------------------------------------------------
// Ajax XML Ticker (txt file source)
// Author: Dynamic Drive (http://www.dynamicdrive.com)
// -------------------------------------------------------------------

////////////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 Ajax Ticker Object function
// ajax_ticker(xmlfile, divId, divClass, delay, optionalfadeornot)
// -------------------------------------------------------------------

function ajax_ticker(xmlfile, divId, divClass, delay, fadeornot){
	this.xmlfile=xmlfile //Variable pointing to the local ticker xml file (txt)
	this.tickerid=divId //ID of ticker div to display information
	this.delay=delay //Delay between msg change, in miliseconds.
	this.mouseoverBol=0 //Boolean to indicate whether mouse is currently over ticker (and pause it if it is)
	this.pointer=0
	this.opacitystring=(typeof fadeornot!="undefined")? "width: 100%; filter:progid:DXImageTransform.Microsoft.alpha(opacity=100); -moz-opacity: 1" : ""
	if (this.opacitystring!="") this.delay+=500 //add 1/2 sec to account for fade effect, if enabled
	this.opacitysetting=0.2 //Opacity value when reset. Internal use.
	this.messages=[] //Arrays to hold each message of ticker
	this.ajaxobj=createAjaxObj()
	document.write('<div id="'+divId+'" class="'+divClass+'"><div style="'+this.opacitystring+'">Initializing ticker...</div></div>')
	this.getXMLfile()
}

// -------------------------------------------------------------------
// getXMLfile()- Use Ajax to fetch xml file (txt)
// -------------------------------------------------------------------

ajax_ticker.prototype.getXMLfile=function(){
	if (this.ajaxobj){
		var instanceOfTicker=this
		var url=this.xmlfile+"?bustcache="+new Date().getTime()
		this.ajaxobj.onreadystatechange=function(){instanceOfTicker.initialize()}
		this.ajaxobj.open('GET', url, true)
		this.ajaxobj.send(null)
	}
}

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

ajax_ticker.prototype.initialize=function(){ 
	if (this.ajaxobj.readyState == 4){ //if request of file completed
		if (this.ajaxobj.status==200 || window.location.href.indexOf("http")==-1){ //if request was successful
			this.contentdiv=document.getElementById(this.tickerid).firstChild //div of inner content that holds the messages
			var xmldata=this.ajaxobj.responseText
			this.contentdiv.style.display="none"
			this.contentdiv.innerHTML=xmldata

			if (this.contentdiv.getElementsByTagName("div").length==0){ //if no messages were found
				this.contentdiv.innerHTML="<b>Error</b> fetching remote ticker file!"
			return
		}
		var instanceOfTicker=this
		document.getElementById(this.tickerid).onmouseover=function(){instanceOfTicker.mouseoverBol=1}
		document.getElementById(this.tickerid).onmouseout=function(){instanceOfTicker.mouseoverBol=0}
		if (window.attachEvent) //Clean up loose references in IE
			window.attachEvent("onunload", function(){instanceOfTicker.contentdiv=instanceOfTicker.ajaxobj=null})
			//Cycle through XML object and store each message inside array
			for (var i=0; i<this.contentdiv.getElementsByTagName("div").length; i++){
			if (this.contentdiv.getElementsByTagName("div")[i].className=="message")
				this.messages[this.messages.length]=this.contentdiv.getElementsByTagName("div")[i].innerHTML
			}
			this.contentdiv.innerHTML=""
			this.contentdiv.style.display="block"
			this.rotatemsg()
		}
	}
}

// -------------------------------------------------------------------
// rotatemsg()- Rotate through ticker messages and displays them
// -------------------------------------------------------------------

ajax_ticker.prototype.rotatemsg=function(){
	var instanceOfTicker=this
	if (this.delay!=500) {
		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!
			this.fadetransition("reset") //FADE EFFECT- RESET OPACITY
			this.contentdiv.innerHTML=this.messages[this.pointer]
			this.fadetimer1=setInterval(function(){instanceOfTicker.fadetransition('up', 'fadetimer1')}, 100) //FADE EFFECT- PLAY IT
			this.pointer=(this.pointer<this.messages.length-1)? this.pointer+1 : 0
			setTimeout(function(){instanceOfTicker.rotatemsg()}, this.delay) //update container periodically
		}
	} else {	
		this.fadetransition("reset") //FADE EFFECT- RESET OPACITY
		this.contentdiv.innerHTML=this.messages[this.pointer]
		this.fadetimer1=setInterval(function(){instanceOfTicker.fadetransition('up', 'fadetimer1')}, 100) //FADE EFFECT- PLAY IT
		this.pointer=(this.pointer<this.messages.length-1)? this.pointer+1 : 0
	}
}

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

ajax_ticker.prototype.fadetransition=function(fadetype, timerid){
	var contentdiv=this.contentdiv
	if (fadetype=="reset")
		this.opacitysetting=0.2
		if (contentdiv.filters && contentdiv.filters[0]){
			if (typeof contentdiv.filters[0].opacity=="number") //IE6+
				contentdiv.filters[0].opacity=this.opacitysetting*100
			else //IE 5.5
				contentdiv.style.filter="alpha(opacity="+this.opacitysetting*100+")"
			}
		else if (typeof contentdiv.style.MozOpacity!="undefined" && this.opacitystring!=""){
			contentdiv.style.MozOpacity=this.opacitysetting
		}
	else
		this.opacitysetting=1
	if (fadetype=="up")
		this.opacitysetting+=0.1
	if (fadetype=="up" && this.opacitysetting>=1)
		clearInterval(this[timerid])
}



var bustcachevar=1 //bust potential caching of external pages after initial request? (1=yes, 0=no)
var loadedobjects=""
var rootdomain="http://"+window.location.hostname
var bustcacheparameter=""

function ajaxpage(url, containerid){
	var page_request = false
	if (window.XMLHttpRequest) // if Mozilla, Safari etc
		page_request = new XMLHttpRequest()
	else if (window.ActiveXObject){ // if IE
		try {
			page_request = new ActiveXObject("Msxml2.XMLHTTP")
		} catch (e){
			try{
				page_request = new ActiveXObject("Microsoft.XMLHTTP")
			} catch (e){}
		}
	} else
	return false

	page_request.onreadystatechange=function(){
		loadpage(page_request, containerid)
	}
	if (bustcachevar) //if bust caching of external page
		bustcacheparameter=(url.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime()
	page_request.open('GET', url+bustcacheparameter, true)
	page_request.send(null)
}

function loadpage(page_request, containerid){
	if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1))
		document.getElementById(containerid).innerHTML=page_request.responseText
}

function loadobjs(){
	if (!document.getElementById)
		return
	for (i=0; i<arguments.length; i++){
		var file=arguments[i]
		var fileref=""
		if (loadedobjects.indexOf(file)==-1){ //Check to see if this object has not already been added to page before proceeding
			if (file.indexOf(".js")!=-1){ //If object is a js file
				fileref=document.createElement('script')
				fileref.setAttribute("type","text/javascript");
				fileref.setAttribute("src", file);
			} else if (file.indexOf(".css")!=-1){ //If object is a css file
				fileref=document.createElement("link")
				fileref.setAttribute("rel", "stylesheet");
				fileref.setAttribute("type", "text/css");
				fileref.setAttribute("href", file);
			}
		}
		if (fileref!=""){
			document.getElementsByTagName("head").item(0).appendChild(fileref)
			loadedobjects+=file+" " //Remember this object as being already added to page
		}
	}
}