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
// rss_ticker(RSS_id, cachetime, divId, divClass, delay, optionalswitch)
// -------------------------------------------------------------------

function rss_ticker(RSS_id, cachetime, divId, divClass, delay, optionalswitch)
{
    this.RSS_id = RSS_id //Array key indicating which RSS feed to display
    this.cachetime = cachetime //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 optionalswitch != "undefined") ? optionalswitch : -1
    this.mouseoverBol = 0 //Boolean to indicate whether mouse is currently over ticker (and pause it if it is)
    this.pointer = 0
    this.ajaxobj = createAjaxObj()
    document.write('<div id="' + divId + '" class="' + divClass + '"> loading ...</div>')
    this.getAjaxcontent()
}

// -------------------------------------------------------------------
// getAjaxcontent()- Makes asynchronous GET request to "rssfetch.php" with the supplied parameters
// -------------------------------------------------------------------

rss_ticker.prototype.getAjaxcontent = function()
{
    if (this.ajaxobj)
    {
        var instanceOfTicker = this
       
        this.ajaxobj.onreadystatechange = function() { instanceOfTicker.initialize() }
        this.ajaxobj.open('GET', "/?SendRSS=1&SiteID=2&SectionID=10&Host=www.homeloanblog.com.au", true)
        this.ajaxobj.send(null)
    }
}

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

rss_ticker.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>Error</b> fetching RSS feed!";
                return
            }
            var instanceOfTicker = this
            this.feeditems = xmldata.getElementsByTagName("item")

            //Cycle through RSS XML object and store each piece of the item element as an attribute of the element
            for (var i = 0; i < this.feeditems.length; i++)
            {
                this.feeditems[i].setAttribute("ctitle", this.feeditems[i].getElementsByTagName("title")[0].firstChild.nodeValue)
                this.feeditems[i].setAttribute("clink", this.feeditems[i].getElementsByTagName("link")[0].firstChild.nodeValue)
                this.feeditems[i].setAttribute("cdescription", this.feeditems[i].getElementsByTagName("description")[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
// -------------------------------------------------------------------

rss_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
    {
        var tickerDiv = document.getElementById(this.tickerid)
        var tickercontent = '<a href="' + this.feeditems[this.pointer].getAttribute("clink") + '">' + this.feeditems[this.pointer].getAttribute("ctitle") + '</a>'
        if (this.logicswitch == "showdescription")
            tickercontent += "<br />" + this.feeditems[this.pointer].getAttribute("cdescription")
        tickerDiv.innerHTML = tickercontent
        this.pointer = (this.pointer < this.feeditems.length - 1) ? this.pointer + 1 : 0
        setTimeout(function() { instanceOfTicker.rotatemsg() }, this.delay) //update container every second
    }
}