[xsl] XSL and js comments (for Google AdSense)

[John Steel <john.steel@xxxxxxxxxxxxxxx>]

The pattern for Google js ads is

<script type="text/javascript"><!--
google_ad_client = "pub-0000000000000000";
...
google_ad_format = "468x60_as";
//--></script>
<script type="text/javascript"
 src="http://pagead2.googlesyndication.com/pagead/show_ads.js";>
</script>

When I run this through xsl I'm getting

<script type="text/javascript"/>
<script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js"/>

as though the transformation has determined the comment isn't important - which it is.
The xsl responsible for producing that part is just

<xsl:template match='*|@*'>
 <xsl:copy>
  <xsl:apply-templates select='node()|@*' />
 </xsl:copy>
</xsl:template>

What have I missed please?

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