How to call a specific method

Hello, this is a very basic question.

I see in the nsm:delivery data schema there's a method to delete the deliveries called CleanupDeliveries

CleanupDeliveries (
String       deliveryId
)

But, how can I call it from a js page? I mean: what's the proper code to all it? I already have the list of IDs in a variable.

Thanks a lot!