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, next = 1;
function so_init() {
    if (!d.getElementById || !d.createElement) return;
    css = d.createElement("link");
    css.setAttribute("href", "portaldata/1/styles/slide.css");
    css.setAttribute('rel', 'stylesheet');
    css.setAttribute('type', 'text/css');
    d.getElementsByTagName("head")[0].appendChild(css);

    imgs = d.getElementById("portalimage").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, 5500);

    while ((next = GetRandom(1, imgs.length - 1)) == current) { }
}

function so_xfade() {
    //	var varLink = arLinks[current+1];
    //	if (varLink == undefined){varLink = arLinks[0];}document.getElementById("portallink").href = varLink;
    cOpacity = imgs[current].xOpacity;
    nIndex = imgs[next] ? next : 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;

        while ((next = GetRandom(0, imgs.length - 1)) == current) { }

        setTimeout(so_xfade, 5500);
    } else {
        setTimeout(so_xfade, 30)
        // settimeout(so_xfade,50) beschreibt die zeit der ausblendung hier 0,5 sek
	;
    }

    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 GetRandom(min, max) {
    if (min > max) {
        return (-1);
    }
    if (min == max) {
        return (min);
    }

    return (min + parseInt(Math.random() * (max - min + 1)));
}