// -------------------------------------------------------------------
// Advanced RSS Ticker (Ajax invocation) core file
// -------------------------------------------------------------------

//Relative URL syntax:
var lastrssbridgeurl="inc/STKbridge.php";

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,pos)
{

    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 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 id="'+divId+'" class="'+divClass+'" style="position:relative; float:left; top:0px; left:0px; "  ></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();	//read the feed to update new content
  

}

// -------------------------------------------------------------------
// 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>Error</b> fetching remote RSS feed!<br />"+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 

        var tickercontent='<div style="width:300px;position:relative; float:left; top:0px; left:0px; clear:both;" >'+linktitle+feeddate+description+'</div>';

        this.fadetransition("reset"); //FADE EFFECT- RESET OPACITY
        tickerDiv.innerHTML=tickercontent;
        this.fadetimer1=setInterval(function(){instanceOfTicker.fadetransition('up', 'fadetimer1')}, 100); //FADE EFFECT- PLAY IT

        //increment array index
        this.pointer=(this.pointer<this.feeditems.length-1)? this.pointer+1 : 0;

        //setTimeout(function(){instanceOfTicker.rotatemsg()}, this.delay);
        this.ajaxobj=createAjaxObj();	//need this for IE to update content correctly
        setTimeout(function(){instanceOfTicker.getAjaxcontent()}, this.delay); 
    }
}

// -------------------------------------------------------------------
// 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]);
}


function getIdx(rf)
{
   switch(rf*1)
   {
       case 300000:
           idx = 0;
           break;
       case 120000:
           idx = 1;
           break;
       case 60000:
           idx = 2;
           break;
       case 30000:
           idx = 3;
           break;
       case 10000:
           idx = 4;
           break;
       case 1000:
           idx = 5;
           break;
       
    }
    return idx;
}


function clearField(val)
{
    val.value = "";
}

function checkEnter(e)
{ //e is event object passed from function invocation

var characterCode; //literal character code will be stored in this variable

if(e && e.which)
{ //if which property of event object is supported (NN4)
    e = e;
    characterCode = e.which; //character code is contained in NN4's which property
}
else
{
    e = event;
    characterCode = e.keyCode; //character code is contained in IE's keyCode property
}

if(characterCode == 13)
{ //if generated character code is equal to ascii 13 (if enter key)
    document.forms[0].submit(); //submit the form
    return false;
}
else
    return true;
}

/*
//convert php var to js var
var s1 = "";
var s2 = "";
var s3 = "";


var test = "<?php echo $s1?>";
if (test.length > 0 && test != "enter symbol")
    s1 = test;

var test = "<?php echo $s2?>";
if (test.length > 0 && test != "enter symbol")
    s2 = test;

var test = "<?php echo $s3?>";
if (test.length > 0 && test != "enter symbol")
    s3 = test;
*/