Ajax / CSS - Google AJAXSLT

AJAXSLT is an implementation of XSL-T in JavaScript, intended for use in fat web pages, which are nowadays referred to as AJAX applications. Because XSL-T uses XPath, it is also an implementation of XPath that can be used independently of XSL-T.
AJAXSLT takes this process one step forward, by implementing XSL-T in Javascript and having it run in your browser. Thus, your web browser can fetch XML documents directly from the server, and perform the format conversion locally; thus saving time and bandwidth.
http://goog-ajaxslt.sourceforge.net/