var images = new Array( '/static/img/home_intro/Bijbelschool_terugkijken.jpg ',
			'/static/img/home_intro/Bijbelschool_aanmelden.jpg ',
			'/static/img/home_intro/Bijbelschool_kracht_1.gif ',
			'/static/img/home_intro/Bijbelschool_Efeze.jpg ',
			'/static/img/home_intro/Bijbelschool_Daniel.jpg ');			

var imageWidth = 525;
var imageHeight = 265;
var imageTimeout = 2000;
var nextImage = 1;
var links = ['http://www.foundation4life.nl/wie/bijbelschool-visie',
             'http://www.foundation4life.nl/wie/bijbelschool-aanmelden',
             'http://www.foundation4life.nl/wie/bijbelschool-aanmelden',
             'http://www.foundation4life.nl/media/bijbelschool-fotos',
             'http://www.foundation4life.nl/wie/bijbelschool-visie', 
             'http://www.foundation4life.nl/wie/bijbelschool-visie',      
];

function setOpacity(el, opacity) {

	//  Which opacity method does this browser support?

	opacity /= 100;

	el.style.opacity = opacity;
	el.style.MozOpacity = opacity;
	el.style.filter = "alpha(opacity=" + (opacity*100) + ")";

}

function fadeImage(el, currentOpacity) {

	currentOpacity += 5;

	if (currentOpacity > 100) {
		setOpacity(el, 100);
		var prevEl = el.previousSibling ? el.previousSibling : el.parentNode.lastChild;
		prevEl.style.visibility = 'hidden';
		el.style.zIndex = 1;
		window.setTimeout(startFading, imageTimeout);
	}
	else {
		setOpacity(el, currentOpacity);
		window.setTimeout(function() { fadeImage(el, currentOpacity); }, 50);
	}

}


function startFading() {
 
    var el = document.getElementById('image-container').childNodes[nextImage];
 
    el.style.visibility = 'visible';
    el.style.zIndex = 2;
 
    el.onclick = function(){ window.location = links[nextImage]; }
 
    setOpacity(el, 0);
    fadeImage(el,0);
 
    nextImage = (nextImage < images.length-1) ? nextImage + 1 : 0;
 
}


function pageLoad() {

	var el = document.getElementById('image-container');

	while (el.firstChild) { el.removeChild(el.firstChild); }

	el.style.width = imageWidth + 'px';
	el.style.height = imageHeight + 'px';

	for(var i=0; i<images.length; i++) {

		var t = document.createElement('IMG');
		t.setAttribute('src',images[i]);
		t.setAttribute('width',imageWidth);
		t.setAttribute('height',imageHeight);
		t.style.position = 'absolute';
		t.style.visibility = 'hidden';
		el.appendChild(t);

	}

	el.firstChild.style.visibility = 'visible';

	window.setTimeout(startFading, imageTimeout);

}


addLoadEvent( pageLoad );