is there a DllImport Internal equivalent for unityscript?

I’m trying to translate the jslib webgl example from c# to unityscript:
http://docs.unity3d.com/Manual/webgl-interactingwithbrowserscripting.html

Can this be translated to unityscript?

[DllImport("__Internal")]
    private static extern void Hello();

If not how do I use the plugin functions in a separate unityscript?

Where C# uses [Something], Unityscript always uses @Something. See the DLL docs.