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;


function so_init() {
	if(!d.getElementById || !d.createElement)return;
	imgs = d.getElementById("foto").getElementsByTagName("img");
	for(i=1;i<imgs.length;i++) imgs[i].xOpacity = 0;
	d.getElementById('foto').style.display='block';
	imgs[0].style.display = "block";
	imgs[0].xOpacity = .99;
	setTimeout(so_xfade,5000);
	if (typeof window.innerWidth != 'undefined'){ 
        widthViewport= window.innerWidth-17; 
        heightViewport= window.innerHeight-17; 
    }else if(typeof document.documentElement != 'undefined' && typeof document.documentElement.clientWidth !='undefined' && document.documentElement.clientWidth != 0){ 
        widthViewport=document.documentElement.clientWidth; 
        heightViewport=document.documentElement.clientHeight; 
    }else{ 
        widthViewport= document.getElementsByTagName('body')[0].clientWidth; 
        heightViewport=document.getElementsByTagName('body')[0].clientHeight; 
    }
	document.getElementById('hcentro').style.height=(heightViewport-230)+'px';
}

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

	nOpacity = imgs[nIndex].xOpacity;
	
	cOpacity-=.05; 
	nOpacity+=.05;
	
	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";
		current = nIndex;
		setTimeout(so_xfade,5000);
	} 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) + ")";
	}
	
}