A jQuery plugin to replace iframes with divs containing their source by loading via ajax. Benefits use parent page's css and have an auto height to your iframe.

jquery.iframe_to_div.js

/**
 * Convert iframes to divs via ajax iframe_to_div jQuery Plugin
 *
 * Uses javascript to replace iframes with divs containing their source content
 * by loading via ajax. If you use this to load vanilla html snippets, this has the
 * effect of applying the page's css to your vanilla html snippet.
 *
 * This will not work if the iframe src is not a relative link due to ajax restrictions across domains.
 *
 * As an example:
 *
 * This html snippet is available at http://website/vanilla.html
 * @code
 *  <!--this table has no styling on it's own, but when loaded via ajax, the
    parent page's css will be applied magically!-->
 *  <table>
 *    <thead><tr><th>Unstyled header</th></tr></thead>
 *    <tr><td>Unstyled table cell</td></tr>
 *  </table>
 * @endcode
 *
 * This is part of the index.html page
 * @code
 *   <iframe src="/vanilla.html"></iframe>
 * @endcode
 *
 * By adding the following js to index.html, the iframe is replaced with the
   snippet from vanilla.html and the css of index.html is applied.
 * @code
 *  $('body').iframe_to_div();
 * @endcode
 *
 * Or you can target a specific iframe directly. The iframe has an id =
   #my-replaceable-iframe
 * @code
 *  $('#my-replaceable-iframe').iframe_to_div();
 * @endcode
 *
 * @return $(this)
 *
 * @author Aaron Klump, In the Loft Studios, LLC
 * @see http://www.intheloftstudios.com
 * @see http://gist.github.com/aklump/5470863
 */
(function($) {
  $.fn.iframe_to_div = function(options) {
    var $context = $(this);

    var settings = $.extend( {
      'loading': 'Loading content...'
    }, options);

    if (!$context.is('iframe')) {
      $context = $context.find('iframe:not(.iframe-to-div-processed)')
    }
    else if ($context.hasClass('iframe-to-div-processed')) {
      return $(this);
    }
    $context.each(function() {
      var $iframe = $(this);
      var $loading = false;
      if (settings.loading) {
        $loading = $('<div><div class="inner">' + settings.loading + '</div></div>');
        $iframe.after($loading.addClass('iframe-to-div-loading'));
      }
      $iframe.hide();

      var src = $iframe.attr('src');
      $.get(src, function(data) {
        $iframe
        .addClass('iframe-to-div-processed')
        .replaceWith(data)
        $loading.remove();
      });
    });

    return $(this);
  };
})(jQuery);