Assign cell style to empty table cells + clear cell style overrides

I’m data merging into a table which will create a multi page document with some empty cells.

I’m trying to write a script that applies a cell style to empty cells and then clears cells style overrides for empty cells as well.

So far I’ve written the following (where 'EmptyCell' is the cell style I want to apply to all empty cells):

var myDocument = app.documents.item(0);

var myTable = myDocument.stories.item(0).tables.item(0);

for(var i = 0; i < myTable.cells.length; i++) {

  if (myTable.cells.contents === '') {

    myTable.cells.appliedCellStyle = 'EmptyCell';

  }

}

for(var i = 0; i < myTable.cells.length; i++) {

  if (myTable.cells.contents === '') {

    myTable.cells.clearCellStyleOverrides();

  }

}

This does what I want it to do, but only to the first table in the multi page document.

What do I need to do to make this cell work for all tables in the multi page document??

I’m a total beginner at scripting so any help would be much appreciated.

Cheers

Mike