How To Store A Function's Return Value Into An Array ??

I have a function that returns an array object

like -

IsWithinGeofence(point)
{
....
...

if(some condition == true)

{
return PointsOfInterest[i];
}}

Here PointsOfInterest[i].lat = 56.45556, PointsOfInterest[i].lng = -2.5413 and i = 2;

I want to be able to store these three values into three global variables in Javascript in order to use these variables somewhere else on the same page as their source.

How do I do this ??