function openMap(URL)
{
      var widthpos=(screen.width/2)-512;
      var heightpos=(screen.height/2)-400;
window.open(URL,"lageplan","toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width=660,height=500,left="+widthpos+",top="+heightpos);
}