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,menub ar=no,scrollbar=no,resizable=no,copyhistory=yes,width='+width+',height='+height+',left='+left+', top='+top+',screenX='+left+',screenY='+top+'');
}