// -------------------------------------------------------------------
// Main RSS Ticker Object function
// rssticker_ajax(cachetime, divId, divClass, delay, optionallogicswitch)
// -------------------------------------------------------------------
function rssticker_ajax(cachetime, divId, divClass, delay, logicswitch) {
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 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=[], this.enclosure=[]//Arrays to hold each component of an RSS item
document.write('<div id="' + divId + '" class="' + divClass + ' row" >Initializing feed...</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

var instanceOfRSSTicker = this;
instanceOfRSSTicker.initialize();
}

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

rssticker_ajax.prototype.initialize = function() {
    var instanceOfRSSTicker = this;
    try //Internet Explorer
          {
        xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
        xmlDoc.async = "false";
        xmlDoc.loadXML(rssData);
    }
    catch (e) {
        try //Firefox, Mozilla, Opera, etc.
            {
            parser = new DOMParser();
            xmlDoc = parser.parseFromString(rssData, "text/xml");
        }
        catch (e) { alert(e.message) }
    }

    this.feeditems = xmlDoc.getElementsByTagName("item");
    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
        try {
            this.description[i] = this.feeditems[i].getElementsByTagName("description")[0].firstChild.nodeValue
        }
        catch (e) {
            this.description[i] = '';
        }


        this.pubdate[i] = this.feeditems[i].getElementsByTagName("pubDate")[0].firstChild.nodeValue
        var url = '';
        if (this.feeditems[i].getElementsByTagName("url")[0]) {
            url = this.feeditems[i].getElementsByTagName("url")[0].firstChild.nodeValue; //.getAttribute('url');
        }
        this.enclosure[i] = url;
    }
    document.getElementById(this.tickerid).onmouseover = function() { instanceOfRSSTicker.mouseoverBol = 1 }
    document.getElementById(this.tickerid).onmouseout = function() { instanceOfRSSTicker.mouseoverBol = 0 }
    this.rotatemsg()


}

function openDetailsWindow(link) {
    showPopWin(link, 650, 600, null, true);
    return false;
}

// -------------------------------------------------------------------
// rotatemsg()- Rotate through RSS messages and displays them
// -------------------------------------------------------------------

rssticker_ajax.prototype.rotatemsg = function() {
    var instanceOfRSSTicker = this
    if (this.mouseoverBol == 1) //if mouse is currently over ticker, do nothing (pause it)
        setTimeout(function() { instanceOfRSSTicker.rotatemsg() }, 100)
    else { //else, construct item, show and rotate it!
        var tickerDiv = document.getElementById(this.tickerid)
        var picture = '';
        if (this.enclosure[this.pointer] != '')
            picture = '<div class="float offsetColumn"><img title="' + this.title[this.pointer] + '" alt="' + this.title[this.pointer] + '" src="' + this.enclosure[this.pointer] + '" />' + '</div>';
        var link = "'" + this.link[this.pointer] + "'";
        var linktitle = '<div class="float"><a onclick="return openDetailsWindow(' + link + ');" href="#">' + this.title[this.pointer] + '</a></div>'
        var description = '<div class="rssdate row">' + this.description[this.pointer] + '</div>'
        var feeddate = '<div style=color:Black;font-weight:bold;>' + this.pubdate[this.pointer] + '</div>'
        if (this.logicswitch.indexOf("description") == -1) description = ""
        if (this.logicswitch.indexOf("date") == -1) feeddate = ""
        
        var tickercontent = '<div class="float padLeft">' + picture + '<div class="float">' + feeddate + linktitle + Dea.htmlDecode(description) + '</div></div>' //STRING FOR FEED CONTENTS 
        this.fadetransition("reset") //FADE EFFECT- RESET OPACITY
        tickerDiv.innerHTML = tickercontent
        this.fadetimer1 = setInterval(function() { instanceOfRSSTicker.fadetransition('up', 'fadetimer1') }, 100) //FADE EFFECT- PLAY IT
        this.pointer = (this.pointer < this.feeditems.length - 1) ? this.pointer + 1 : 0
        setTimeout(function() { instanceOfRSSTicker.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])
}