var newWindow;
function openWindow(url, sizeX, sizeY)
{
    if ((newWindow) && (navigator.appName != 'Netscape')) { newWindow.close(); }
    sizeX = sizeX + 50;
    sizeY = sizeY + 80;
    var traits = 'toolbar=no,directories=no,status=no,scrollbars=no,resizable=yes,menubar=no,';
    var traits = traits+'width='+sizeX+',height='+sizeY;
    var name = 'bild';
    newWindow = window.open(url,name,traits);
}