the script is just a block of text as far as xsl is concerned,
it doesn't need to know it's javascript. So as in any other text blocaks
you can use

<xsl:value-of select="$x"/>

or at least you could do if you removed the <![CDATA section. Unless your
script has < or & in it the CDATA isn't doing anything anyway. If you do
have a lot of < and you don't want to write them as &lt; then you can do
<![CDATA[....
 script = "]]><xsl:value-of select="$x"/><![CDATA[
...]]>
  </script>

David

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