/*
Image Cross Fade Redux
Version 1.0
Last revision: 02.15.2006
steve@slayeroffice.com
Rewrite of old code found here:
http://slayeroffice.com/code/imageCrossFade/index.html
*/

/* CONFIGURAZIONE */
var timeOutInit=3000;			//timeout prima immagine
var timeOutSo_xfade=3000;		//timeout immagini successive
var numss=7;				//numero di slideshow
var arrimm=new Array(numss);	//matrice delle slideshow


window.addEventListener?window.addEventListener('load',so_init,false):window.attachEvent('onload',so_init);
var d=document, zInterval = null, current=0, pause=false;
function so_init(){
	if(!d.getElementById || !d.createElement)return;
	css = d.createElement('link');
	css.setAttribute('href','bnvnet/template/slideshow2.css');
	css.setAttribute('rel','stylesheet');
	css.setAttribute('type','text/css');

	for(j=0;j<numss;j++){
		d.getElementsByTagName('head')[0].appendChild(css);
		arrimm[j]= d.getElementById('slideshow'+j).getElementsByTagName('img');
		for(i=1;i<arrimm[j].length;i++) arrimm[j][i].xOpacity = 0;
		arrimm[j][0].style.display = 'block';
		arrimm[j][0].xOpacity = .99;
	}

	setTimeout(so_xfade,timeOutInit);
}

function so_xfade(){
	for(j=0;j<numss;j++){
		try{
		cOpacity = arrimm[j][current].xOpacity;
		nIndex = arrimm[j][current+1]?current+1:0;
		nOpacity = arrimm[j][nIndex].xOpacity;
		cOpacity-=.05;	nOpacity+=.05;

		arrimm[j][nIndex].style.display = 'block';
		arrimm[j][current].xOpacity = cOpacity;
		arrimm[j][nIndex].xOpacity = nOpacity;
		setOpacity(arrimm[j][current]);
		setOpacity(arrimm[j][nIndex]);
		}
		catch(exception){return false;}
	}

	if(cOpacity<=0)	{
		for(j=0;j<numss;j++){
			arrimm[j][current].style.display = 'none';
		}
		current = nIndex;
		setTimeout(so_xfade,timeOutSo_xfade);
	}
	else	{
		setTimeout(so_xfade,50);
	}

	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) + ')';
	}
}