You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allimages aicontinue="20090824092452|Browse-entry.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="Federal_Reserve_System_2898.jpg" timestamp="2012-05-04T12:06:46Z" user="NolieKeene3" url="http://wiki.jogger.pl/images/d/d8/Federal_Reserve_System_2898.jpg" descriptionurl="http://wiki.jogger.pl/wiki/Plik:Federal_Reserve_System_2898.jpg" ns="6" title="Plik:Federal Reserve System 2898.jpg" />
      <img name="Federal_Reserve_System_1475.jpg" timestamp="2012-05-04T05:32:41Z" user="BorgiaHughes8" url="http://wiki.jogger.pl/images/2/23/Federal_Reserve_System_1475.jpg" descriptionurl="http://wiki.jogger.pl/wiki/Plik:Federal_Reserve_System_1475.jpg" ns="6" title="Plik:Federal Reserve System 1475.jpg" />
      <img name="Bitcoin_vs_Gold_4135.jpg" timestamp="2012-04-19T23:53:28Z" user="PorterWilcox3" url="http://wiki.jogger.pl/images/e/eb/Bitcoin_vs_Gold_4135.jpg" descriptionurl="http://wiki.jogger.pl/wiki/Plik:Bitcoin_vs_Gold_4135.jpg" ns="6" title="Plik:Bitcoin vs Gold 4135.jpg" />
      <img name="The_unstoppable_Bitcoin_5369.jpg" timestamp="2012-04-18T05:18:32Z" user="VineyNieves4" url="http://wiki.jogger.pl/images/9/9e/The_unstoppable_Bitcoin_5369.jpg" descriptionurl="http://wiki.jogger.pl/wiki/Plik:The_unstoppable_Bitcoin_5369.jpg" ns="6" title="Plik:The unstoppable Bitcoin 5369.jpg" />
      <img name="Add-link.png" timestamp="2009-08-24T11:30:15Z" user="WebKing" url="http://wiki.jogger.pl/images/e/ef/Add-link.png" descriptionurl="http://wiki.jogger.pl/wiki/Plik:Add-link.png" ns="6" title="Plik:Add-link.png" />
      <img name="Add-page.png" timestamp="2009-08-24T11:21:08Z" user="WebKing" url="http://wiki.jogger.pl/images/3/37/Add-page.png" descriptionurl="http://wiki.jogger.pl/wiki/Plik:Add-page.png" ns="6" title="Plik:Add-page.png" />
      <img name="Manage-drafts.png" timestamp="2009-08-24T11:17:14Z" user="WebKing" url="http://wiki.jogger.pl/images/e/ed/Manage-drafts.png" descriptionurl="http://wiki.jogger.pl/wiki/Plik:Manage-drafts.png" ns="6" title="Plik:Manage-drafts.png" />
      <img name="Manage.png" timestamp="2009-08-24T10:59:09Z" user="WebKing" url="http://wiki.jogger.pl/images/b/b0/Manage.png" descriptionurl="http://wiki.jogger.pl/wiki/Plik:Manage.png" ns="6" title="Plik:Manage.png" />
      <img name="Entry-level.png" timestamp="2009-08-24T10:47:40Z" user="WebKing" url="http://wiki.jogger.pl/images/4/4c/Entry-level.png" descriptionurl="http://wiki.jogger.pl/wiki/Plik:Entry-level.png" ns="6" title="Plik:Entry-level.png" />
      <img name="Add-category.png" timestamp="2009-08-24T10:37:26Z" user="WebKing" url="http://wiki.jogger.pl/images/9/96/Add-category.png" descriptionurl="http://wiki.jogger.pl/wiki/Plik:Add-category.png" ns="6" title="Plik:Add-category.png" />
    </allimages>
  </query>
</api>