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

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

function so_init()
{
	if(!d.getElementById || !d.createElement)return;
	
	imgs = d.getElementById("head").getElementsByTagName("img");
	imgs[0].style.display = "block";
	setTimeout("so_xfade(0)",10000);
}

function so_xfade(obr)
{

	nynipruh=.99-i;
	novypruh=i;
	novy=obr+1;
	if(novy==imgs.length)
		{
			novy=0;
		}
	imgs[obr].style.display = "block";
	imgs[novy].style.display = "block";
	setOpacity(imgs[obr],nynipruh);
	setOpacity(imgs[novy],novypruh);
	if (i<.99)
		{
			i=i+.01;
			setTimeout("so_xfade("+obr+")",60);
		}
	else
		{
			i=0;
			imgs[obr].style.display = "none";
			setTimeout("so_xfade("+novy+")",10000);
		}
}

function setOpacity(obj,pruh)
{
	obj.style.opacity = pruh;
	obj.style.MozOpacity = pruh;
	obj.style.filter = "alpha(opacity=" + (pruh*100) + ")";
}