var popUpWin=0;
function popUp(URLStr, width, height)
{
	var left=35;
	var top=35;
	if(popUpWin && !popUpWin.closed)
		popUpWin.close();
	popUpWin=open(URLStr, 'popUpWin', 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width='+width+',height='+height+',left='+left+', top='+top+',screenX='+left+',screenY='+top+'');
	return false; //avoid eventual link following
}