var popUpWin=0;

function popUp(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=yes,copyhistory=yes,width='+width+',height='+height+',left='+left+', top='+top+',screenX='+left+',screenY='+top+'');

}