var popUpWin=0;

function popUpWindow(name, URLStr, width, height) {
	var left = screen.availWidth/2 - width/2;
	var top = screen.availHeight/2 - height/2;
	if(popUpWin && !popUpWin.closed) popUpWin.close();
	popUpWin = open(URLStr, name, 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=no,width='+width+',height='+height+',left='+left+', top='+top+',screenX='+left+',screenY='+top+'');
	popUpWin.focus();
}