<input type="button" id="trackButton" value="Track"
onclick="toggleTrackArea();"><br/>
<fieldset id="trackArea"><legend>Track</legend>
+<p id="trackData"><span id="trackLength">0</span> km,
+<span id="trackDuration">0</span> min</p>
<input type="button" id="saveTrackButton" value="Save"
onclick="saveTrack();">
<input type="button" id="dumpTrackButton" value="Dump"