var popUpWin=0;
function popUpWindow(URLStr, left, top, width, height, scrolling)
{
  //if(popUpWin)
  //{
  //  if(!popUpWin.closed) popUpWin.close();
  //}

 popUpWin = open(URLStr, Math.random(), 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=' + scrolling +',resizable=no,copyhistory=yes,width='+width+',height='+height+',left='+left+', top='+top+',screenX='+left+',screenY='+top+'');
}