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

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.initialize()
}


ajax_ticker.prototype.initialize=function(){
this.contentdiv=document.getElementById(this.tickerid).firstChild //div of inner content that holds the messages
this.contentdiv.style.display="none"
//document.getElementById('contentdiv').style.display="none"
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}
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()
}

ajax_ticker.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!
this.fadetransition("reset") //FADE EFFECT- RESET OPACITY
instanceOfTicker.displayItem(this.messages[this.pointer], 1)
}
}

//additional function by BuildingBox to add the text one character at a time
ajax_ticker.prototype.displayItem=function(txt, pos)
{
	var instanceOfTicker=this;
	var newTxt = txt;	
	var linkArray = txt.split(">");
	var callBack = false;
	if(linkArray.length>0)
	{
		tickerTxt = linkArray[0] + ">";
		if(linkArray[1].length-2 > pos)
		{
			callBack = true;
			var intxt = linkArray[1];
			intxt = intxt.substring(0,pos);
			tickerTxt += intxt + "</a>";
		}		
	}
	
	pos += 1;
	
	if(callBack)
	{
		this.contentdiv.innerHTML=tickerTxt;
		setTimeout(function(){instanceOfTicker.displayItem(txt, pos)}, 40);
	}
	else
	{
		this.pointer=(this.pointer<this.messages.length-1)? this.pointer+1 : 0
		setTimeout(function(){instanceOfTicker.rotatemsg()}, 2000);
	}	
}

// -------------------------------------------------------------------
// 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])
}