function openWin(url, name, w, h) {
	var newwindow;
	var leftVal = (screen.width - w) / 2;
	var topVal = (screen.height - h - 100) / 2;
	newwindow = window.open(url, name, 'height=' + h +',width=' + w + ',left=' + leftVal + ',top=' + topVal + ',resizable=no,scrollbars=yes,toolbar=no,status=yes');
		if (window.focus) 
			newwindow.focus();
	}