var popUpWin=0; function popUpWindow(URLStr, left, top, width, height) { if(popUpWin) { if(!popUpWin.closed) popUpWin.close(); } popUpWin = open(URLStr, 'popUpWin', 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=yes,width='360',height='240',left='+left+', top='+top+',screenX='+left+',screenY='+top+''); }