function neuesBild (source) {
        document.getElementById("Pre_Bild").src = source;
        document.getElementById("Pre_Bild").title = "Bild";
}
function layeraus(layer)
{
    document.getElementById(layer).style.visibility = "hidden";
    document.getElementById("logolayer2").style.visibility = "hidden";
}
function layerein(layer)
{
    var ns4 = document.layers;
    var ns6 = document.getElementById && !document.all;
    var ie4 = document.all;

    bodywidth = document.getElementById("body").offsetWidth;
    bodytop = document.getElementById("body").offsetTop;
    haupt2width = document.getElementById("haupt2").offsetWidth;
    bildwidth = document.getElementById(layer).offsetWidth;
    logowidth = document.getElementById("logo").offsetWidth;
    logoheight = document.getElementById("logo").offsetHeight;

    layerlinks = (((bodywidth - haupt2width) / 2) + (haupt2width - bildwidth) - logowidth) + 11;
    layertop = logoheight + bodytop;

    if(ns4) { // Netscape
        document.layer[layer].left = layerlinks;
        document.layer[layer].top = layertop;
        document.layer[layer].visibility = "visible";
    return;
    }
    else if(ns6) { // Firefox
        document.getElementById("logolayer2").style.left = 300;//layerlinks;
        document.getElementById("logolayer2").style.top = 200;//layertop;
        document.getElementById("logolayer2").style.visibility = "visible";
    return;
    }
    else if(ie4) { // IE
        document.getElementById(layer).style.left = layerlinks;
        document.getElementById(layer).style.top = layertop;
        document.getElementById(layer).style.visibility = "visible";
    return;
    }

}

/*
function init() {
   document.werbung.visibility="visible"
   werbung()
}
function werbung() {
   document.werbung.left=window.innerWidth+window.pageXOffset-100
   document.werbung.top=window.pageYOffset
   setTimeout("werbung()", 500)
}
*/