var popUpCMS=0;
function popup_preview(URLStr, left, top, width, height)
{
  if(popUpCMS){
    if(!popUpCMS.closed) popUpCMS.close();
  }
  popUpCMS = open(URLStr, 'popUpCMS', 'toolbar=no,location=no,directories=no,status=no,menu bar=no,scrollbar=yes,resizable=yes,copyhistory=no,width='+width+',height='+height+',left='+left+', top='+top+',screenX='+left+',screenY='+top+'');
}