function createCell(row, col) {
  var cell = document.createElement("div");
  cell.className = "c";
  cell.appendChild(document.createTextNode(row +  'row, ' + col + ' cell'));
  return cell;
}

function createRow() {
  var row = document.createElement("div");
  row.className = "r";
  return row;
}

function createRowgroup() {
  var rowgrp = document.createElement("div");
  rowgrp.className = "g";
  return rowgrp;
}

function createTable() {
  var table = document.createElement("div");
  table.className = "r";
  return table;
}