The first one probably works
<select id="mode" style="width:70px">
<option value="WALKING">Walking</option>
<option value="DRIVING">Driving</option>
</select>
but that is just good luck because those happen to be string values of
constants
google.maps.TravelMode.WALKING and
google.maps.TravelMode.DRIVING
Put those constants in an array and let the select element choose from
the array
var modeArray = [];
modeArray[0] = google.maps.TravelMode.WALKING;
modeArray[0] = google.maps.TravelMode.DRIVING;
var selectedMode =
modeArray[document.getElementById("mode").selectedIndex];
Don't set values of select element at all. As Jeff said, they are not
very useful. Some browsers return a selected value but not all. That
is because of different 'multiple' attribute handling. It is better to
keep the values in a separate array.
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