Add second location marker to google map

[Chuper]

I have a map using this code to call up javascript for displaying a google map.
<div id="map" class="map" data-map-zoom="5" data-map-latlng="40.743914, -73.989376" data-snazzy-map-theme="grayscale" data-map-marker="images/marker.png" data-map-marker-size="23*35">

Is it possible to add a second location marker to the map using this code or would the javascript code need to be edited?

[Noppy]

what happens if you put another set of lat/longs in the quotes i.e.

data-map-latlng="40.743914, -73.989376, 40.673333, -73.89999"

?

[Chuper]

I tried that and nothing changes unfortunately.