// JavaScript Document


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

var bildStand = 3500; // Zeitspanne Millisekunden
var blender = 40; // Dauer eines einzelnen Fadeout-/Fadein-Schrittes in Millisekunden
var opschritt = 0.01;  // Helligkeitsdifferenz zwischen den Fadeout-/Fadein-Schritten


imgs = new Array(), zInterval = null, current=0, pause=false;

function so_init() {

	imgs = document.getElementById("bildelement").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,bildStand);
}

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

	nOpacity = imgs[nIndex].xOpacity;
	
	cOpacity-=opschritt; 
	nOpacity+=opschritt;
	
	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,bildStand);
	} else {
		setTimeout(so_xfade,blender);
	}
	
	function setOpacity(obj) {
		if(obj.xOpacity>.99) {
			obj.xOpacity = .99;
			return;
		}
		if(obj.xOpacity<0) {
			obj.xOpacity = 0;
			return;
		}
		obj.style.opacity = obj.xOpacity;
		obj.style.MozOpacity = obj.xOpacity;
		obj.style.filter = "alpha(opacity=" + (obj.xOpacity*100) + ")";
	}
	
}