[ESTK] Merge Two tables

Found this ancient one:

function merge_tables () {
  var t = app.selection[0].parentStory.tables.everyItem().getElements();
  var rows_to_move = 0;
  for (var i = 1; i < t.length; i++)
    rows_to_move += t.bodyRowCount;
  var moved = 1;
  var rows_length, cells_length, j, k;
  for (var i = 1; i < t.length; i++)
    {
    rows_length = t.bodyRowCount;
    for (j = 0; j < rows_length; j++)
      {
      pb.value = moved++;
      t[0].rows.add ();
      cells_length = t.rows.cells.length;
      for (k = 0; k < cells_length; k++)
        t.rows.cells.texts[0].move ( 
          LocationOptions.after, t[0].rows[-1].cells.insertionPoints[0]);
      }
    }
  for (var i = t.length-1; i > 0; i--)
    t.remove();
}
if (app.documents.length == 0 || app.selection.length == 0 || app.selection[0].tables.length == 0) {
 alert ("Select a story or some text containing more than one table.")
 exit()
}
merge_tables();

Peter