function popUp(page)
{
  window.open(page, "popup", "width=640,height=480,left=0,top=0,status=no,menu=no,toolbar=no,scrollbars=yes");
}

function wOpen(page)
{
  window.open(page, "fenster");
}

function showId(id) {
document.getElementById(id).style.display='block';
}
function hideId(id) {
document.getElementById(id).style.display='none';
}