Javascript : Get variable & run a method from another script

I have this 3 javascript scripts :

GameSetup.js

 function Start () {
     // Run Map.Start
 }

A function of Map.js

 function Start () {
     var map = new Array(6);
     var i : int;
     var j : int;
 
     // We do this do avoid OutOfBounceException
     for (i = 0; i < 6; i++) {
     map[i] = new Array(6);
     }
     for (i = 0; i < 6; i++) {
         for (j = 0; j < 6; j++) {
             map[i][j] = -1;
         }
     }

and a function of BoxControl.js

 function Update() {
     var i : int;
     var j : int;
     if(Input.GetKey(moveUp)){
         for (i = 2; i <= 5; i++) {
             for (j = 2; j <= 5; j++) {                   
                 map[i][j] = 1;
         }
     }

1. I want to run the Map.Start function from the GameSetup.

2. And after creating the map I want to send the map array to the BoxControl so I can modify the map.