var popUpWin=0;
function popUp(URLStr)
{
  if(popUpWin)
  {
    if(!popUpWin.closed) popUpWin.close();
  }
  popUpWin = open(URLStr, 'popUpWin', 'toolbar=no,location=no,directories=no,status=yes,menubar=no,scrollbars=yes,resizable=no,copyhistory=no,width=510,height=320,left=125, top=150,screenX=125,screenY=150');
}