public async Task startTrip(String boatId)
		{
			String sessionCookie = await login(hc);

            ongoingTrip = new TripInfo{ startTime = DateTime.Now };

			var content = new ContentForRequest {
				RowerID = rowerId,
				BoatID = boatId,
			}.build (sessionCookie);

			var response = await hc.PostAsync ("http://www.rokort.dk/workshop/row_update.php", content);

			Console.WriteLine ("Turen er startet, http status " + response.StatusCode + ", response " + await response.Content.ReadAsStringAsync ());
		}
        async Task fetchTripInfo (string sessionCookie)
		{
			HttpRequestMessage message = new HttpRequestMessage(HttpMethod.Get, "http://www.rokort.dk/workshop/workshop2.php");
			message.Headers.Add("Cookie", sessionCookie);

			HttpResponseMessage response = await hc.SendAsync (message);
			String responseBody = await response.Content.ReadAsStringAsync ();

			Match match = Regex.Match (responseBody, 
                "<td onclick=\"showWin\\('row_edit.php\\?id=[0-9]*'\\);\"><span class=\"tooltip\"><a href=\"workshop.php\\?lookup=b_[0-9]*\" onclick=\"javascript:return\\(false\\)\">([0-9]*)</a></span></td>" +
                "[^<]*" + 
                "<td onclick=\"showWin\\('row_edit.php\\?id=([0-9]*)'\\);\"><span class=\"tooltip\"><a href=\"workshop.php\\?lookup=r_" + rowerId + "\" onclick=\"javascript:return\\(false\\)\">[^<]*</a></span></td>" +
				"[^<]*" + 
				"<td class=\"no_wrap\" onclick=\"showWin\\('row_edit.php\\?id=[0-9]*'\\);\">([^<]*)</td>");

            if (match.Success) {
				string startDateString = DateTime.Now.ToString("yyyy-MM-dd") + " " + match.Groups[3].Value; // match.Groups[3] has values like "12:01" or "08:05"
				DateTime startDateTime = DateTime.ParseExact (startDateString, "yyyy-MM-dd HH:mm", CultureInfo.InvariantCulture);

				ongoingTrip = new TripInfo {
                    id = match.Groups [2].Value,
                    boatID = match.Groups[1].Value,
					startTime = startDateTime
				};
			} else {
				ongoingTrip = null;
			}

            Console.WriteLine ("onGoingTrip for rower " + rowerId + ": " + ongoingTrip);
		}