function closeWindow()
  {
    if (opener) window.close();
    else window.history.go(-1);
  }

  function openWindow (url,name,width,height)
  {	
    if (width) w=width; else w=720;
    if (height) h=height; else h=500;
    someWindow=window.open(url,name,"width="+w+",height="+h+",toolbar=no,menubar=no,scrollbars=yes,status=yes,location=no");
    someWindow.focus();
  }