function ShowWeather()
{
	function AddCityWeather(City, Degree)
	{
		document.writeln('<tr><td>&nbsp;', City , '</td><td align=right>', Degree, '&nbsp;&#176;&nbsp;</td></tr>');
	}
	if (typeof(vHanoi)!='undefined'     && typeof(dHanoi)    !='undefined') AddCityWeather(vHanoi, dHanoi);
	if (typeof(vHaiPhong)!='undefined'  && typeof(dHaiPhong) !='undefined') AddCityWeather(vHaiPhong, dHaiPhong);
	if (typeof(vDaNang)!='undefined'    && typeof(dDaNang)   !='undefined') AddCityWeather(vDaNang, dDaNang);
	if (typeof(vHoChiMinh)!='undefined' && typeof(dHoChiMinh)!='undefined') AddCityWeather(vHoChiMinh, dHoChiMinh);
}
ShowWeather();