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

var d=document, imgs = new Array(), zInterval = null, current=0;

function so_init() {
	minh = 0;
	if(!d.getElementById || !d.createElement)return;
	var ss = d.getElementById("slideshow");
	if(!ss) return;
	imgs = ss.getElementsByTagName("img");
	if(imgs.length<1) return;
	owidth = ss.offsetWidth/2;
	for(i=0;i<imgs.length;i++) {
		if(minh<imgs[i].height) minh=imgs[i].height;
		imgs[i].style.left = owidth-(imgs[i].width/2);
		imgs[i].style.display = "none";
		imgs[i].xOpacity = 0;
	}
	if(minh) {
		ss.style.height = minh + 'px';
		for(i=0;i<imgs.length;i++) imgs[i].style.top = (minh / 2) - (imgs[i].height / 2); 
	}
	imgs[0].style.display = "block";
	imgs[0].xOpacity = .99;
	setTimeout(so_xfade,3000);
}

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,3000);
	} 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) + ")";
	}
}