// -------------------------------------------------------------------



// Advanced RSS Ticker (Ajax invocation) core file



// Author: Dynamic Drive (http://www.dynamicdrive.com)



// -------------------------------------------------------------------







//Relative URL syntax:



var lastrssbridgeurl="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 rssticker_ajax(RSS_id, cachetime, divId, divClass, delay, logicswitch){



this.RSS_id=RSS_id //Array key indicating which RSS feed to display



this.cachetime=0 //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=[], this.link=[], this.description=[], this.pubdate=[] //Arrays to hold each component of an RSS item



this.ajaxobj=createAjaxObj()



document.write('<div align="center" id="'+divId+'" class="'+divClass+'" >Searching database...</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>No scores to display"+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



}



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>'



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])



}