How can I reference SceneObjects from my script?

I have the following script I'd like to test but replacing objectA and objectB with the names of my objects is returning 'undefined'. Am I trying to get the SceneObject correctly? 

// -----JS CODE-----

// @input SceneObject objectA

// @input float collideDistance = 0.25

// @input SceneObject objectB




var objA = script.objectA.getTransform().getWorldPosition();

var objB = script.objectB.getTransform().getWorldPosition();




var distance = Math.abs( objA.distance(objB));




if( distance <= script.collideDistance ) {

print( "COLLIDE!" );

script.objectA.enabled = false;




}

else

{

}