function bt1()
{
document.bt1x.src="../100007/bt1r.jpg";
}

function br1()
{
document.bt1x.src="../100007/bt1.jpg";
}

function bt2()
{
document.bt2x.src="../100007/bt2r.jpg";
}

function br2()
{
document.bt2x.src="../100007/bt2.jpg";
}

function bt3()
{
document.bt3x.src="../100007/bt3r.jpg";
}

function br3()
{
document.bt3x.src="../100007/bt3.jpg";
}

function bt4()
{
document.bt4x.src="../100007/bt4r.jpg";
}

function br4()
{
document.bt4x.src="../100007/bt4.jpg";
}

function bt5()
{
document.bt5x.src="../100007/bt5r.jpg";
}

function br5()
{
document.bt5x.src="../100007/bt5.jpg";
}

function binfo(url)
{
var hWnd = window.open(url, "Ausstellung", 'toolbar=0,location=center,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width=900,height=600');
hWnd.focus();
}


function tinfo(url)
{
var hWnd = window.open(url, "Info", 'toolbar=0,location=top,directories=0,status=0,menubar=0,scrollbars=0,resizable=1,width=600,height=530');
hWnd.focus();
}