/*****

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


*****/


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

var d=document, zInterval = null, pause=false;
var arrImgs = new Array();
var arrCurr = new Array();

var nStrutt = 0;
var iStruttCorrente = 0;

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

	// 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);
	*/

	nStrutt = 0;
	while(d.getElementById("imageVetrina" + (nStrutt + 1)))
	{
		var imgs = d.getElementById("imageVetrina" + (nStrutt + 1)).getElementsByTagName("img");
		arrImgs[nStrutt] = imgs;
		arrCurr[nStrutt] = 0;
		
		for(i=1;i<imgs.length;i++) 
			imgs[i].xOpacity = 0;
		if(imgs.length > 0)
		{
			imgs[0].style.display = "block";
			imgs[0].xOpacity = .99;
		}
		nStrutt += 1;
	}
	setTimeout(so_xfade,1000);

}

function setOpacity(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) + ")";
}

function so_xfade() 
{
	if(iStruttCorrente == nStrutt)
		iStruttCorrente = 0;
	
	// intervengo sull'immagine iStruttCorrente
	var imgs = arrImgs[iStruttCorrente];
	var current = arrCurr[iStruttCorrente];
	        
	cOpacity = imgs[current].xOpacity;
	nIndex = imgs[current+1]?current+1:0;

	nOpacity = imgs[nIndex].xOpacity;
	
	cOpacity-=.10; 
	nOpacity+=.10;
	
	imgs[nIndex].style.display = "block";
	imgs[current].xOpacity = cOpacity;
	imgs[nIndex].xOpacity = nOpacity;
	
	setOpacity(imgs[current]); 
	setOpacity(imgs[nIndex]);
	
	if(cOpacity<=0) {
		imgs[current].style.display = "none";
		// incremento current su immagine corrente e setto come iStruttCorrente la successiva...
		arrCurr[iStruttCorrente] = nIndex;
		//iStruttCorrente = parseInt(nStrutt * Math.random());
		++iStruttCorrente;
		setTimeout(so_xfade,100);
	} else {
		setTimeout(so_xfade,100);
	}
}