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// -------------------------------------------------------------------
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// Ajax XML Ticker (txt file source)
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// Author: Dynamic Drive (http://www.dynamicdrive.com)
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// -------------------------------------------------------------------
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////////////No need to edit beyond here//////////////
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function createAjaxObj(){
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var httprequest=false
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if (window.XMLHttpRequest){ // if Mozilla, Safari etc
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httprequest=new XMLHttpRequest()
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if (httprequest.overrideMimeType)
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httprequest.overrideMimeType('text/xml')
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}
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else if (window.ActiveXObject){ // if IE
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try {
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httprequest=new ActiveXObject("Msxml2.XMLHTTP");
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}
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catch (e){
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try{
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httprequest=new ActiveXObject("Microsoft.XMLHTTP");
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}
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catch (e){}
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}
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}
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return httprequest
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}
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// -------------------------------------------------------------------
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// Main Ajax Ticker Object function
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// ajax_ticker(xmlfile, divId, divClass, delay, optionalfadeornot)
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// -------------------------------------------------------------------
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function ajax_ticker(xmlfile, divId, divClass, delay, fadeornot){
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this.xmlfile=xmlfile //Variable pointing to the local ticker xml file (txt)
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this.tickerid=divId //ID of ticker div to display information
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this.delay=delay //Delay between msg change, in miliseconds.
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this.mouseoverBol=0 //Boolean to indicate whether mouse is currently over ticker (and pause it if it is)
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this.pointer=0
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this.opacitystring=(typeof fadeornot!="undefined")? "width: 100%; filter:progid:DXImageTransform.Microsoft.alpha(opacity=100); -moz-opacity: 1" : ""
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if (this.opacitystring!="") this.delay+=500 //add 1/2 sec to account for fade effect, if enabled
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this.opacitysetting=0.2 //Opacity value when reset. Internal use.
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this.messages=[] //Arrays to hold each message of ticker
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this.ajaxobj=createAjaxObj()
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document.write('<div id="'+divId+'" class="'+divClass+'"><div style="'+this.opacitystring+'">Initializing ticker...</div></div>')
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this.getXMLfile()
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}
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// -------------------------------------------------------------------
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// getXMLfile()- Use Ajax to fetch xml file (txt)
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// -------------------------------------------------------------------
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ajax_ticker.prototype.getXMLfile=function(){
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if (this.ajaxobj){
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var instanceOfTicker=this
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var url=this.xmlfile+"?bustcache="+new Date().getTime()
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this.ajaxobj.onreadystatechange=function(){instanceOfTicker.initialize()}
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this.ajaxobj.open('GET', url, true)
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this.ajaxobj.send(null)
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}
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}
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// -------------------------------------------------------------------
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// initialize()- Initialize ticker method.
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// -Gets contents of xml file and parse it using JavaScript DOM methods
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// -------------------------------------------------------------------
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ajax_ticker.prototype.initialize=function(){
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if (this.ajaxobj.readyState == 4){ //if request of file completed
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if (this.ajaxobj.status==200 || window.location.href.indexOf("http")==-1){ //if request was successful
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this.contentdiv=document.getElementById(this.tickerid).firstChild //div of inner content that holds the messages
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var xmldata=this.ajaxobj.responseText
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this.contentdiv.style.display="none"
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this.contentdiv.innerHTML=xmldata
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if (this.contentdiv.getElementsByTagName("div").length==0){ //if no messages were found
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this.contentdiv.innerHTML="<b>Error</b> fetching remote ticker file!"
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return
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}
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var instanceOfTicker=this
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document.getElementById(this.tickerid).onmouseover=function(){instanceOfTicker.mouseoverBol=1}
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document.getElementById(this.tickerid).onmouseout=function(){instanceOfTicker.mouseoverBol=0}
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if (window.attachEvent) //Clean up loose references in IE
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window.attachEvent("onunload", function(){instanceOfTicker.contentdiv=instanceOfTicker.ajaxobj=null})
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//Cycle through XML object and store each message inside array
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for (var i=0; i<this.contentdiv.getElementsByTagName("div").length; i++){
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if (this.contentdiv.getElementsByTagName("div")[i].className=="message")
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this.messages[this.messages.length]=this.contentdiv.getElementsByTagName("div")[i].innerHTML
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}
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this.contentdiv.innerHTML=""
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this.contentdiv.style.display="block"
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this.rotatemsg()
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}
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}
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}
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// -------------------------------------------------------------------
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// rotatemsg()- Rotate through ticker messages and displays them
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// -------------------------------------------------------------------
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ajax_ticker.prototype.rotatemsg=function(){
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var instanceOfTicker=this
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if (this.mouseoverBol==1) //if mouse is currently over ticker, do nothing (pause it)
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setTimeout(function(){instanceOfTicker.rotatemsg()}, 100)
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else{ //else, construct item, show and rotate it!
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this.fadetransition("reset") //FADE EFFECT- RESET OPACITY
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this.contentdiv.innerHTML=this.messages[this.pointer]
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this.fadetimer1=setInterval(function(){instanceOfTicker.fadetransition('up', 'fadetimer1')}, 100) //FADE EFFECT- PLAY IT
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this.pointer=(this.pointer<this.messages.length-1)? this.pointer+1 : 0
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setTimeout(function(){instanceOfTicker.rotatemsg()}, this.delay) //update container periodically
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}
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}
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// -------------------------------------------------------------------
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// fadetransition()- cross browser fade method for IE5.5+ and Mozilla/Firefox
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// -------------------------------------------------------------------
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ajax_ticker.prototype.fadetransition=function(fadetype, timerid){
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var contentdiv=this.contentdiv
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if (fadetype=="reset")
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this.opacitysetting=0.2
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if (contentdiv.filters && contentdiv.filters[0]){
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if (typeof contentdiv.filters[0].opacity=="number") //IE6+
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contentdiv.filters[0].opacity=this.opacitysetting*100
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else //IE 5.5
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contentdiv.style.filter="alpha(opacity="+this.opacitysetting*100+")"
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}
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else if (typeof contentdiv.style.MozOpacity!="undefined" && this.opacitystring!=""){
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contentdiv.style.MozOpacity=this.opacitysetting
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}
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else
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this.opacitysetting=1
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if (fadetype=="up")
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this.opacitysetting+=0.1
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if (fadetype=="up" && this.opacitysetting>=1)
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clearInterval(this[timerid])
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}
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