React component without JSX

reactnojsx.js

var CommentBox = React.createClass({
  render: function() {
    return (
      React.DOM.div({
        className: 'commentBox',
        children: 'Hello, world! I am a CommentBox.'
      })
    );
  }
});
React.renderComponent(
  CommentBox({}),
  document.getElementById('content')
);