Change Page size with a Script

I have made artwork in Illustrator that is set up as two page spreads on 1 artboard.

I need to convert this to single page spreads.

I.e. So for half the documents, I need to set the anchor point of the document to top left and half the width of the artboard.

For the other half of the documents, I need to set anchor point to to right and half the width.

Is this possible with scripting?

I have look around online to find ways of accessing the document size and anchor point via scripting, but cannot seem to find any resources.

Thanks for any help that can be offered.

Edit: Also is it possible to create a new artboard with a script and assign it a name?