JS language binding

Michael Kay's XSLT book (p. 593) gives an example that won't work in version
5 of XML Spy.
It complains about <xsl:script> elements in this code sample:
<xsl:stylesheet version="1.1"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:js="javascript:code">
	<xsl:script language="javascript"
implements-prefix="js"></xsl:script>
</xsl:stylesheet>
Is there a different name space I should be using?

Thanks,
Doug

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