Ajax / JavaScript to make IP's tree (Prototype - Json - Ext)

Sirs, good afternoon We made several changes in the modules, so we need a very basic Ajax tree that read an XML to display IP's from several devices. The page must have the same appearance and behaivour of an example made in Extjs (Json), but instead of loading data through a Json connector it have to read a XML file, updating the content each 10 minutes (httprequest method). It must use prototype and scriptaculous libraries, and plain Ajax, no framework, in order to reduce the size of .js downloads. Attached the XML data file and on-line the example of appearance: <[login to view URL]> The XML file updates in the server automatically, so only requirement is to update client browser. [login to view URL] and Firefox compatible. This is a small module of a more complete application in Ajax to display IP Cameras and images recorded. Noted Thanks, Eduardo