Execute a .jsm file from Javascript at runtime

Hello,

Is it possible to execute a .jsm file from Javascript at runtime, after the page has loaded and the document.ready event has been fired?

We have server-side Javascript that we run via a .jsm file like this, from Velocity:

$core_v2_widget.ExecuteFile($fileName))

However, we need to re-run that script multiple times during the life-cycle of a page view.  Is this possible?

Chris