var NS4 = (document.layers) ? 1 : 0;
var IE4 = (document.all) ? 1 : 0;
var NS6 = (document.getElementById) ? 1 : 0;
var overmenu = 0;
var zeituhr = 0;

if (IE4 && NS6) {
    IE4=0;
}

function popUp(layerName)
{
    if (document.body)
    {
        if (NS4)
        {
            document.layers[layerName].visibility = "show";
            document.layers[layerName].visibility = "show";
        }
        else
        {
            if (NS6)
            {
                E = eval("document.getElementById('"+layerName+"').style");
                E.visibility = "visible";
                F = eval("document.getElementById('"+layerName+"').style");
                F.visibility = "visible";
            }
            else
            {
                document.all[layerName].style.visibility = "visible";
                document.all[layerName].style.visibility = "visible";
            }
        }
    }
}

function timer()
{
    if (overmenu == 0) {
        zeituhr = setTimeout("hide()",2500);
    }
}

function stoptimer()
{
    if (zeituhr) {
        clearTimeout(zeituhr);
    }
}

function hide()
{
    if (overmenu == 0) {
        popDown('buttons');
    }
}

function popDown(layerName)
{
    if (document.body)
    {
        if (NS4)
        {
            document.layers[layerName].visibility = "hide";
            document.layers[layerName].visibility = "hide";
        }
        else
        {
            if (NS6)
            {
                E = eval("document.getElementById('"+layerName+"').style");
                E.visibility = "hidden";
                F = eval("document.getElementById('"+layerName+"').style");
                F.visibility = "hidden";
            }
            else
            {
                document.all[layerName].style.visibility = "hidden";
                document.all[layerName].style.visibility = "hidden";
            }
        }
    }
}