How do I detect that is behind an object to another.

// detects if other transform is behind this object
     var other : Transform;
     function Update() {
         if (other) {
             var forward = transform.TransformDirection(Vector3.forward);
             var toOther = other.position - transform.position;
             if (Vector3.Dot(forward,toOther) < 0)
                 print ("The other transform is behind me!");
         }
     }[/code:23r2e767]
This is how to do it in Construct program?