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  1. #1
    SitePoint Evangelist mumford1's Avatar
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    Opera not initializing ticker

    Hi

    Cound someone take a look at this please http://www.hardingscatering.co.uk/06/index.htm if viewed in Opera 7.5 it just hangs on initialising script?

    And i really dont know why

    Any suggestions?

    Javascript

    Code:
    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+=3000 //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+'">Initializing ticker...
    ')
    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 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.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
    }
    }
    
    // -------------------------------------------------------------------
    // 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])
    }

  2. #2
    Programming Team silver trophybronze trophy
    Mittineague's Avatar
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    West Springfield, Massachusetts
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    page in Opera 7.5

    The page is fine with Opera 8.54 Windows OS
    The 8.5 changelog doesn't have any clues, but the 8.02 changelog http://www.opera.com/docs/changelogs/windows/802/ has this
    Improved support for XMLHttpRequest.
    and the 8.01 changelog http://www.opera.com/docs/changelogs/windows/801/ has this
    Improvements to XMLHttpRequest support, added support for XMLHttpRequest.setRequestHeader.
    and the 8.0 changelog http://www.opera.com/docs/changelogs/windows/800/ has this
    Implemented XMLHttpRequest.getAllResponseHeaders and XMLHttpRequest.getResponseHeader
    Maybe your script is using something that version 7.5 doesn't support?


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