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

var d=document, imgs = new Array(), zInterval = null, current=0, pause=false;
var toggle=true;
var toggle_gen=true;

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

	css = d.createElement('link');
	css.setAttribute('href','/css/slideshow2.css');
	css.setAttribute('rel','stylesheet');
	css.setAttribute('type','text/css');
	d.getElementsByTagName('head')[0].appendChild(css);

	imgs = d.getElementById('slideshow').getElementsByTagName('img');
	for(i=1;i<imgs.length;i++) imgs[i].xOpacity = 0;
	imgs[0].style.display = 'block';
	imgs[0].xOpacity = .99;

	setTimeout(so_xfade,5000);
}

function so_xfade()  {
	try{
		if (toggle) {
			cOpacity = imgs[current].xOpacity;
			nIndex = imgs[current+1]?current+1:0;
			nOpacity = imgs[nIndex].xOpacity;

			cOpacity-=.03;
			nOpacity+=.03;

			imgs[nIndex].style.display = 'block';
			imgs[current].xOpacity = cOpacity;
			imgs[nIndex].xOpacity = nOpacity;

			setOpacity(imgs[current]);
			setOpacity(imgs[nIndex]);
		}
		if(cOpacity<=0)
		{
			if (toggle) imgs[current].style.display = 'none';
			current = nIndex;
			setTimeout(so_xfade,2950);
		}
		else
		{
			/*
			if (cOpacity>=.93) {d.getElementById('slidetext').innerHTML=nTesti[nIndex];d.getElementById('slidetextSomm').innerHTML=nTestiSomm[nIndex];}
			*/
			if (nOpacity>=.91) {d.getElementById('slidetext').innerHTML=nTesti[nIndex];d.getElementById('slidetextSomm').innerHTML=nTestiSomm[nIndex];}
			setTimeout(so_xfade,50);
		}
	}catch(err){so_init();}
}

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 toggle_Pause() {
	if (toggle) {
		document['ctrl_imm'].src = "/images/bt_slide_next.gif";
		toggle=false;
	}else{
		toggle=true;
		document['ctrl_imm'].src = "/images/bt_slide_pausa.gif";
		if (!toggle_gen) {
			toggle_gen=true;
			imgs = d.getElementById('slideshow').getElementsByTagName('img');
			for(i=1;i<imgs.length;i++) imgs[i].xOpacity = 0;
			imgs[current].style.display = 'block';
			imgs[current].xOpacity = .99;
		}	
	}
}

function aperture(fotonum) {
	document['ctrl_imm'].src = "/images/bt_slide_next.gif";
	toggle=false;
	toggle_gen=false;
	try{
	for (i=0;i<4;i++) {
		if ((fotonum-1)==i) {
			imgs[i].style.display = 'block';
			imgs[i].style.opacity = .99;
			imgs[i].style.MozOpacity = .99;
			imgs[i].style.filter = 'alpha(opacity=100)';
			d.getElementById('slidetext').innerHTML=nTesti[i];
			d.getElementById('slidetextSomm').innerHTML=nTestiSomm[i];
			current=i;
		}else{
			imgs[i].style.display = 'none';
		}	
	}	
	}catch(err){so_init();}
}