function openWindow(url, width, height, name, scroll, ret)
{
	var w;
	if (width && height)
	{
		var params = ''
		params += 'width=' + width;
		params += ',height=' + height;
		params += ',resizable=no';
		params += ',scrollbars=' + (scroll ? 'yes' : 'no');
		params += ',toolbar=no';
		params += ',menubar=no';
		params += ',status=no';
		params += ',location=no';
		params += ',directories=no';
		w = window.open(url, (!name ? '' : name), params);
	}
	else
	{
		if (!name)
		{
			w = window.open(url);
		}
		else
		{
			w = window.open(url, name);
		}
	}
	
	if (ret) return w;
	return false;
}

function showCalendar()
{
    openWindow('/calendar/', 740, 660, '', true);
}