//Fade In Content Viewer: By JavaScript Kit: http://www.javascriptkit.com
var intervalID;
var fadeid = "whatsnew";
var contentclass = "fadecontent";
var togglerid = "whatnewstoggler";
var speed = 100;

var fadecontentviewer={
	csszindex: 1,
	fade:function($allcontents, togglerid, selected, speed){
		var selected=parseInt(selected)		
		var $togglerdiv=$("#"+togglerid)
		var $target=$allcontents.eq(selected)
		
		lastItem = selected;
		
		if ($target.length==0){ //if no content exists at this index position (ie: stemming from redundant pagination link)
			alert("No content exists at page number "+selected+"!")
			return 
		}
		//alert($(".fadecontent").children().length/2)

		if ($togglerdiv.attr('lastselected')==null || parseInt($togglerdiv.attr('lastselected'))!=selected){
			var $toc=$("#"+togglerid+" .toc")
			var $selectedlink=$toc.eq(selected)
			$("#"+togglerid+" .next").attr('nextpage', (selected<$allcontents.length-1)? selected+1+'pg' : 0+'pg')
			$("#"+togglerid+" .prev").attr('previouspage', (selected==0)? $allcontents.length-1+'pg' : selected-1+'pg')
			$target.css({zIndex: this.csszindex++, visibility: 'visible'})
			$target.hide()
			$target.fadeIn(speed)
			$toc.removeClass('selected')
			$selectedlink.addClass('selected')
			$togglerdiv.attr('lastselected', selected+'pg')
		}
	},

	setuptoggler:function($allcontents, togglerid, speed){
		var $toc=$("#"+togglerid+" .toc")
		$toc.each(function(index){
				$(this).attr('pagenumber', index+'pg')
		})
		
		var $next=$("#"+togglerid+" .next")
		var $prev=$("#"+togglerid+" .prev")
		$next.click(function(){
			fadecontentviewer.fade($allcontents, togglerid, $(this).attr('nextpage'), speed)
			return false
		})
		$prev.click(function(){
			fadecontentviewer.fade($allcontents, togglerid, $(this).attr('previouspage'), speed)
			return false
		})
		$toc.click(function(){
			fadecontentviewer.fade($allcontents, togglerid, $(this).attr('pagenumber'), speed)
			return false
		})
	},
	
	pause:function() {
		if(document.getElementById('pause').innerHTML=="Pausar") {
			document.getElementById('pause').innerHTML = "Iniciar",
			$("#pause").addClass("on");

			clearInterval(intervalID);
		}
		else {
			document.getElementById('pause').innerHTML = "Pausar",
			$("#pause").removeClass("on");
			fadecontentviewer.init();
		}
	},
	
	init:function()
	{
		var selected = 0;
		
		$(document).ready(function(){
			var faderheight=$("#"+fadeid).height()
			var $fadecontents=$("#"+fadeid+" ."+contentclass)
			
			$fadecontents.css({top: 0, left: 0, height: faderheight, visibility: 'hidden'})
			fadecontentviewer.setuptoggler($fadecontents, togglerid, speed)
			
			intervalID = setInterval(function(){fadecontentviewer.fade($fadecontents, togglerid, selected, speed); selected = selected == ($(".fadecontent").children().length/2-1) ? 0 : selected = selected+1;}, 6000);
			
			$(window).bind('unload', function(){ //clean up
				$("#"+togglerid+" .toc").unbind('click')
				$("#"+togglerid+" .next", "#"+togglerid+" .prev").unbind('click')
			})
		})
	}
}