Can I implement a new function with JavaScript like msxsl:script in IE?

宇义 <[email protected]> Thu, 30 Oct 2008 20:06:52 -0700 (PDT)
Newsgroups gmane.comp.mozilla.devel.layout.xslt
Organization http://groups.google.com
Message-ID <c4f75022-aa95-40e7-8e0a-acdd4e4eb538@q26g2000prq.googlegroups.com>
It's seems no way to extend the functions in Firefox, but I want use
dyn:evaluate of EXSLT, how can I implement it? Thanks everyone.