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HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allimages gaifrom="2013-03-22-190951-news H4 4269.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2577" ns="6" title="Soubor:130px-Gallerypicture CZ.jpg" />
      <page pageid="2578" ns="6" title="Soubor:130px-Gallerypicture2 CZ.jpg" />
      <page pageid="3039" ns="6" title="Soubor:001-2.jpg" />
      <page pageid="3043" ns="6" title="Soubor:0TU-2-cover.jpg" />
      <page pageid="2575" ns="6" title="Soubor:130px-Gallerycoraab CZ.jpg" />
      <page pageid="2579" ns="6" title="Soubor:130px-Gallerypostavy CZ.jpg" />
      <page pageid="2576" ns="6" title="Soubor:130px-Gallerygeography CZ.jpg" />
      <page pageid="3042" ns="6" title="Soubor:0TU-banner.jpg" />
      <page pageid="2580" ns="6" title="Soubor:130px-Gallerysymbol CZ.jpg" />
      <page pageid="2232" ns="6" title="Soubor:2013-03-22-001259-news 4 4269.jpg" />
    </pages>
  </query>
</api>