Using JavaScript for Calculations

Hi everyone,

I've been using Storyline for a while, but have only recently started to use the JavaScript function. I'm trying to create a calculator to determine wind chill based on two variables: Air Temperature (airtemp) and Air Velocity (airvelocity). 

The calculation itself is very complicated, so it probably wasn't a good first JavaScript project for me to take on!  I think I've set up the code correctly - however, when triggering the JavaScript, nothing happens. There are no error messages or pop-ups either, so I am confused about what I'm doing wrong. At the moment, the airtemp variable is set to -10 and the airvelocity variable is set to 50.

The script I have so far is:

var player = GetPlayer();

var airtemp = player.GetVar("airtemp")

var airvelocity = player.GetVar("airvelocity")

var windchill = 13.12+0.6215*airtemp-11.37*Math.pow(airvelocity,0.16)+0.3955*airtemp*Math.pow(airvelocity,0.16);

player.SetVar("windchill", windchill);

Does this look right? Can anyone tell me where I'm going wrong?

Thanks,

Josh