I am using RSForms Directory, and for my 'Details Layout' I need to embed a map using Javascript, but I have a value from the form which I need to call in the Javascript code, I've tried the following but it's not using the value from my form:

The value I'm calling from the form is {MMSI: value}

<script type="text/javascript">
width = '100%'; //the width of the embedded map in pixels or percentage
height = 550; //the height of the embedded map in pixels or percentage
border = 0; //the width of border around the map. Zero means no border
notation = false; //true or false to display or not the vessel icons and options at the left
shownames = true; //true or false to dispaly ship names on the map
latitude = 37.4460; //the latitude of the center of the map in decimal degrees
longitude = 24.9467; //the longitude of the center of the map in decimal degrees
zoom = 9; //the zoom level of the map. Use values between 2 and 17
maptype = 3; //use 0 for Normal map, 1 for Satellite, 2 for Hybrid, 3 for Terrain
trackvessel = {MMSI: value} //the MMSI of the vessel to track, if within the range of the system
fleet = ''; //the registered email address of a user-defined fleet to display
remember = false; //true or false to remember or not the last position of the map
</script>
<script type="text/javascript" src="www.marinetraffic.com/ais/embed.js"></script>


This loads the map, but without tracking the correct vessel (the MMSI value is essentially the registration of the vessel).

Any ideas how I can get this to work please?