[Xsltforms-support] User defined functions example

[Isidro V. V. <jv...@gm...>]

I am trying to run the example presented here 
(http://en.wikibooks.org/wiki/XSLTForms/XSLTForms_only_Extensions#User-Defined_Functions) 
but the browser complains about a syntax error and, when I open the 
console, I see the error message:

ReferenceError: XPathCoreFunctions is not defined

Is that example updated to the current xsltforms version orhas anyone 
tested it?

Best regards

Isidro