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   <p><a href="http://www.w3.org/"><img alt="W3C" height="48" src="http://www.w3.org/Icons/w3c_home" width="72"></a></p>
   <h1>HTML5</h1>
   <h2 class="no-num no-toc" id="a-vocabulary-and-associated-apis-for-html-and-xhtml">A vocabulary and associated APIs for HTML and XHTML</h2>
   </div><nav>
   <a href="obsolete.html">&#8592; 12 Obsolete features</a> &#8211;
   <a href="spec.html#contents">Table of contents</a> &#8211;
   <a href="iana-considerations.html">IANA considerations &#8594;</a>
  </nav><p>This is revision 1.3142.</p>


  <h2 id="no"><span class="secno">13 </span>Things that you can't do with this specification because
  they are better handled using other technologies that are further
  described herein</h2><p><i>This section is non-normative.</i></p><p>There are certain features that are not handled by this
  specification because a client side markup language is not the right
  level for them, or because the features exist in other languages
  that can be integrated into this one. This section covers some of
  the more common requests.</p><!-- There are also certain features that are not handled by this
  specification or any other, but that SHOULD be handled by another
  specification:

    * find object at (x,y)
      http://msdn.microsoft.com/workshop/author/dhtml/reference/methods/elementfrompoint.asp
    * find mouse position
    * screen object: top left width height pixelDepth colorDepth
      availWidth availHeight availLeft availTop
    * methods/properties for managing scrolling, especially in <textarea>,
      such as .scrollTop and .scrollHeight in Mozilla
    * support access Array element via () instead of [] (IEism)
      http://bugzilla.mozilla.org/show_bug.cgi?id=289876
    * Need to say that NodeList's items are enumerable, so that
        for (var x in myNodeList) { }
      ...works. (ack Dethe Elza)
    * a way to show icons for file types
      e.g. http://www.gadgetopia.com/2004/05/04/FileIconTag.html
      (this should probably be a function for the 'content',
      'background-image' and 'list-style-image' properties in CSS)
    * custom syntax highlighting in <textarea>, <pre> (ack Ryan Johnson)
      (this would probably best be done as some sort of output filter
      at the CSS level, rather than anything HTML-specific. It would
      have to support both <textarea>, where the data isn't in the
      DOM proper, and <pre>, where it is.)

  XXX should ensure these are filed with the relevant people and groups
  --><h3 id="localization"><span class="secno">13.1 </span>Localization</h3><p>If you wish to create localized versions of an HTML application,
  the best solution is to preprocess the files on the server, and then
  use HTTP content negotiation to serve the appropriate language.</p><!-- <p>XXX example here</p> --><h3 id="declarative-3d-scenes"><span class="secno">13.2 </span>Declarative 3D scenes</h3><p>Embedding 3D imagery into XHTML documents is the domain of X3D,
  or technologies based on X3D that are namespace-aware.</p><!-- <p>XXX example here</p> --></body></html>

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