code: function htmlAsEntities(html){
      html = html.replace(/&/g, '&amp;');
      html = html.replace(/>/g, '&gt;');
      html = html.replace(/</g, '&lt;');
      html = html.replace(/"/g, '&quot;');
      html = html.replace(/'/g, '&#039;');
      return html;
  }
docs: Converts HTML markup to its
  equivalent representation
  
  @param  string
  @return string