Question about Overriding Functions

I have a base class then a subclass.

IF the base class has a OnTriggerEnter() function, how do I override that function with the subclass?

I thought, you have a base class, which you can declare it to be a virtual function, then down the line, you use override function.

THanks in advance.

In c# you do it like you say:

public class Base : MonoBehaviour
{
    protected virtual void OnTriggerEnter(Collider other) {}
}

public class Child : Base
{
    protected override void OnTriggerEnter(Collider other) {}
}

In javascript you'd just use function for both:

class Base extends MonoBehaviour
{
   function OnTriggerEnter(other : Collider) {}
}

class Child extends Base
{
   function OnTriggerEnter(other : Collider) {}
}

or in unity 2.6's javascript:

class Base extends MonoBehaviour
{
    virtual function OnTriggerEnter(other : Collider) {}
}

class Child extends Base
{
    virtual function OnTriggerEnter(other : Collider) {}
}