/*

======================================================================

Pausing RSS scroller JavaScript engine- ? Dynamic Drive (http://www.dynamicdrive.com)

Docs: http://www.dynamicdrive.com/dynamicindex17/rsspausescroller/

Last modified: March 16th, 2006.

======================================================================

*/



//URL to "scrollerbridge.php" on your server:

var bridgepath="lastrss/scrollerbridge.php"



//Advanced users: Edit below function to format the RSS feed output as desired

//formatrssmessage(divid, message_index_within_array, linktarget, logicswitch)



function formatrssmessage(divid, msgnumber, linktarget, logicswitch){

var rsscontent=rsscontentdata[divid][msgnumber]

var linktitle='<span class="rsstitle"><a href="'+unescape(rsscontent.link)+'" target="'+linktarget+'">'+unescape(rsscontent.title)+'</a></span>'

var description='<div class="rssdescription">'+unescape(rsscontent.description)+'</div>'

var feeddate='<span class="rssdate">'+unescape(rsscontent.date)+'</span>'

if (logicswitch.indexOf("description")!=-1 && logicswitch.indexOf("date")!=-1) //Logic switch- Show description and date

return linktitle+"<br />"+feeddate+description

else if (logicswitch.indexOf("description")!=-1) //Logic switch- Show just description

return linktitle+"<br />"+description

else if (logicswitch.indexOf("date")!=-1) //Logic switch- Show just date

return linktitle+"<br />"+feeddate

else

return linktitle //Default- Just return hyperlinked RSS title

}



//////NO NEED TO EDIT BEHIND HERE///////////////////////////



var rsscontentdata=new Array() //global array to hold RSS feeds contents



//rsspausescroller(RSS_id, divId, divClass, delay, linktarget, optionalswitch)



function rsspausescroller(RSS_id, divId, divClass, delay, linktarget, logicswitch){

this.tickerid=divId //ID of ticker div to display information

this.delay=delay //Delay between msg change, in miliseconds.

this.linktarget=(typeof linktarget!="undefined")? linktarget : ""

this.logicswitch=(typeof logicswitch!="undefined")? logicswitch : ""

this.mouseoverBol=0 //Boolean to indicate whether mouse is currently over scroller (and pause it if it is)

this.hiddendivpointer=1 //index of message array for hidden div

this.js_is_loaded=0

this.number_of_tries=0

document.write('<div id="'+divId+'" class="'+divClass+'" style="position: relative; overflow: hidden"><div class="innerDiv" style="position: absolute; width: 100%" id="'+divId+'1"><span style="position: absolute"><font color="#1f527b" face="verdana" size="1"><b>Cargando titulares AVN ...</b></font></span></div><div class="innerDiv" style="position: absolute; width: 100%; visibility: hidden" id="'+divId+'2"></div></div>')

if (document.getElementById){ //perform basic DOM browser support

var parameters="id="+encodeURIComponent(RSS_id)+"&divid="+divId+"&bustcache="+new Date().getTime()

rsspausescroller.getRSScontentJS(bridgepath+"?"+parameters)

this.do_onjsload()

}

}



// -------------------------------------------------------------------

// do_onjsload()- Checks if external JS containing RSS feed is loaded yet

// -If not, continue to check until yes, or abort after certain tries.

// -------------------------------------------------------------------



rsspausescroller.prototype.do_onjsload=function(){

var scrollerinstance=this

if (typeof rsscontentdata[this.tickerid]=="undefined" && this.number_of_tries<40){ //if JS array holding RSS content not yet loaded

this.number_of_tries++

setTimeout(function(){scrollerinstance.do_onjsload()}, 200) //recheck

}

else if (typeof rsscontentdata[this.tickerid]!="undefined"){ //if JS array has loaded

this.tickerdiv=document.getElementById(this.tickerid)

this.visiblediv=document.getElementById(this.tickerid+"1")

this.hiddendiv=document.getElementById(this.tickerid+"2")

this.visibledivtop=parseInt(rsspausescroller.getCSSpadding(this.tickerdiv))

//set width of inner DIV to outer DIV width minus padding (padding assumed to be top padding x 2)

this.visiblediv.style.width=this.hiddendiv.style.width=this.tickerdiv.offsetWidth-(this.visibledivtop*2)+"px"

this.visiblediv.innerHTML=formatrssmessage(this.tickerid, 0, this.linktarget, this.logicswitch)

this.hiddendiv.innerHTML=formatrssmessage(this.tickerid, 1, this.linktarget, this.logicswitch)

this.do_ondivsinitialized()

}

else

document.getElementById(this.tickerid).innerHTML=rsscontentdata+"<br />..."

}



// -------------------------------------------------------------------

// do_ondivsinitialized()- Checks if two divs of scroller is each populated with RSS message yet

// -If not, continue to check until yes, or abort after certain tries.

// -------------------------------------------------------------------



rsspausescroller.prototype.do_ondivsinitialized=function(){

var scrollerinstance=this

if (parseInt(this.visiblediv.offsetHeight)==0 || parseInt(this.hiddendiv.offsetHeight)==0)

setTimeout(function(){scrollerinstance.do_ondivsinitialized()}, 100)

else

this.initialize()

}



// -------------------------------------------------------------------

// initialize()- Initialize scroller method.

// -Get div objects, set initial positions, start up down animation

// -------------------------------------------------------------------



rsspausescroller.prototype.initialize=function(){

var scrollerinstance=this

this.getinline(this.visiblediv, this.hiddendiv)

this.hiddendiv.style.visibility="visible"

//set width of inner DIVs to outer DIV's width minus padding (padding assumed to be top padding x 2)

this.visiblediv.style.width=this.hiddendiv.style.width=this.tickerdiv.offsetWidth-(this.visibledivtop*2)+"px"

this.tickerdiv.onmouseover=function(){scrollerinstance.mouseoverBol=1}

this.tickerdiv.onmouseout=function(){scrollerinstance.mouseoverBol=0}

if (window.attachEvent) //Clean up loose references in IE

window.attachEvent("onunload", function(){scrollerinstance.tickerdiv.onmouseover=scrollerinstance.tickerdiv.onmouseout=null})

setTimeout(function(){scrollerinstance.animateup()}, this.delay)

}





// -------------------------------------------------------------------

// animateup()- Move the two inner divs of the scroller up and in sync

// -------------------------------------------------------------------





rsspausescroller.prototype.animateup=function(){

var scrollerinstance=this

if (parseInt(this.hiddendiv.style.top)>(this.visibledivtop+5)){

this.visiblediv.style.top=parseInt(this.visiblediv.style.top)-5+"px"

this.hiddendiv.style.top=parseInt(this.hiddendiv.style.top)-5+"px"

setTimeout(function(){scrollerinstance.animateup()}, 50)

}

else{

this.getinline(this.hiddendiv, this.visiblediv)

this.swapdivs()

setTimeout(function(){scrollerinstance.rotatemessage()}, this.delay)

}

}



// -------------------------------------------------------------------

// swapdivs()- Swap between which is the visible and which is the hidden div

// -------------------------------------------------------------------



rsspausescroller.prototype.swapdivs=function(){

var tempcontainer=this.visiblediv

this.visiblediv=this.hiddendiv

this.hiddendiv=tempcontainer

}



rsspausescroller.prototype.getinline=function(div1, div2){

div1.style.top=this.visibledivtop+"px"

div2.style.top=Math.max(div1.parentNode.offsetHeight, div1.offsetHeight)+"px"

}



// -------------------------------------------------------------------

// rotatemessage()- Populate the hidden div with the next message before it's visible

// -------------------------------------------------------------------



rsspausescroller.prototype.rotatemessage=function(){

var scrollerinstance=this

if (this.mouseoverBol==1) //if mouse is currently over scoller, do nothing (pause it)

setTimeout(function(){scrollerinstance.rotatemessage()}, 100)

else{

var i=this.hiddendivpointer

var ceiling=rsscontentdata[this.tickerid].length

this.hiddendivpointer=(i+1>ceiling-1)? 0 : i+1

this.hiddendiv.innerHTML=formatrssmessage(this.tickerid, this.hiddendivpointer, this.linktarget, this.logicswitch)

this.animateup()

}

}



// -------------------------------------------------------------------

// getRSScontentJS()- Fetch RSS feed as external JavaScript

// -------------------------------------------------------------------



rsspausescroller.getRSScontentJS=function(scripturl){

var scriptref=document.createElement('script')

scriptref.setAttribute("type","text/javascript")

scriptref.setAttribute("src", scripturl)

document.getElementsByTagName("head").item(0).appendChild(scriptref)

}





rsspausescroller.getCSSpadding=function(tickerobj){ //get CSS padding value, if any

if (tickerobj.currentStyle)

return tickerobj.currentStyle["paddingTop"]

else if (window.getComputedStyle) //if DOM2

return window.getComputedStyle(tickerobj, "").getPropertyValue("padding-top")

else

return 0

}