/*****

Image Cross Fade Redux
Version 1.0
Last revision: 02.15.2006
steve@slayeroffice.com

Please leave this notice intact. 

Rewrite of old code found here: http://slayeroffice.com/code/imageCrossFade/index.html


*****/

// Décalage (en ms) entre les fondus de chaque groupe d'image. Mettre à 0 pour qu'ils changent tous en même temps
var decalage = 200;

window.addEventListener?window.addEventListener("load",so_init,false):window.attachEvent("onload",so_init);

//var d=document, imgs1 = new Array(), imgs2 = new Array(), imgs3 = new Array(), zInterval = null, current=0, pause=false;
var d=document, containers = new Array(), zInterval = null, current=0;

function so_init() {
	if(!d.getElementById || !d.createElement)return;

	// taken from http://forums.devshed.com/showpost.php?p=2182479&postcount=4
	if (document.getElementsByClassName == undefined) {
		document.getElementsByClassName = function(className)
		{
			var hasClassName = new RegExp("(?:^|\\s)" + className + "(?:$|\\s)");
			var allElements = document.getElementsByTagName("*");
			var results = [];
	
			var element;
			for (var i = 0; (element = allElements[i]) != null; i++) {
				var elementClass = element.className;
				if (elementClass && elementClass.indexOf(className) != -1 && hasClassName.test(elementClass))
					results.push(element);
			}
	
			return results;
		}
	}


	// DON'T FORGET TO GRAB THIS FILE AND PLACE IT ON YOUR SERVER IN THE SAME DIRECTORY AS THE JAVASCRIPT!
	// http://slayeroffice.com/code/imageCrossFade/xfade2.css
	css = d.createElement("link");
	css.setAttribute("href","xfade2.css");
	css.setAttribute("rel","stylesheet");
	css.setAttribute("type","text/css");
	d.getElementsByTagName("head")[0].appendChild(css);


	var containerElems = d.getElementsByClassName('imageContainer');
	//alert(containerElems.length);
	for (var iElem = 0; iElem < containerElems.length; iElem++)
	{
		var containerElem = containerElems[iElem];
		//alert (containerElems[0].getElementsByTagName("img").length);
		var imgs = containerElem.getElementsByTagName("img");
		for(i=1;i<imgs.length;i++) imgs[i].xOpacity = 0;
		imgs[0].style.display = "block";
		imgs[0].xOpacity = .99;

		var container = new Container(imgs);
				
		containers.push(container);

		//setTimeout(function () {container.so_xfade();},3000);
		//setTimeout(container.so_xfade,3000);  // OK
		container.scheddule(3000 + iElem * decalage);  // OK ?
		
	}
	

}


var Container = function (_imgs) {

	var m_this = this;
	
	this.imgs = _imgs;
	
	this.current = 0;
	
	this.num = Container.counter++;
	
	this.so_xfade = function () {
	
		var cont = m_this;
		
		//alert("so_xfade on num " + this.num + " " + this + " m_this: " + m_this + " current: " + cont.current);

		cOpacity = cont.imgs[cont.current].xOpacity;
		nIndex = cont.imgs[cont.current+1]?cont.current+1:0;
	
		nOpacity = cont.imgs[nIndex].xOpacity;
		
		cOpacity-=.05; 
		nOpacity+=.05;
		
		cont.imgs[nIndex].style.display = "block";
		cont.imgs[cont.current].xOpacity = cOpacity;
		cont.imgs[nIndex].xOpacity = nOpacity;
		
		cont.setOpacity(cont.imgs[cont.current]); 
		cont.setOpacity(cont.imgs[nIndex]);
		
		if(cOpacity<=0) {
			cont.imgs[cont.current].style.display = "none";
			cont.current = nIndex;
			//setTimeout(cont.so_xfade,3000);
			//setTimeout(function () {cont.so_xfade();},3000);  // OK
			cont.scheddule(3000);
		} else {
			//setTimeout(cont.so_xfade,90);
			//setTimeout(function () {cont.so_xfade();},90);
			//setTimeout(function () {cont.so_xfade();},90);  //  OK
			cont.scheddule(90);
		}
	};
			
	this.setOpacity = function (obj) {
		if(obj.xOpacity>.99) {
			obj.xOpacity = .99;
			return;
		}
		obj.style.opacity = obj.xOpacity;
		obj.style.MozOpacity = obj.xOpacity;
		obj.style.filter = "alpha(opacity=" + (obj.xOpacity*100) + ")";
	};
	
	this.scheddule = function (delay)
	{
			setTimeout(function () {m_this.so_xfade();}, delay);
	} 

}

Container.counter = 0;