If your XSL stylesheet produces HTML output with javascript sometimes the XSLT processor escapes the "<" and the ">" inside the javascript code. If this happens your javascript will not work properly. One way to suppress this undesired behaviour is by including the javascript code such as in

<script type="text/javascript" src="http://www.yoursite.com/yourscript.js"/>

If you still want to inline the javascript code inside the XSL sheet you can do the following:

<script type="text/javascript">
  <xsl:text disable-output-escaping="yes">
    <![CDATA[
/* put your unescaped javascript code here .... */
 
    ]]>
  </xsl:text>
</script> 

Usually the xsl:text element with the attribute disable-output-escaping is not necessary. But in some situations it can be helpful, depending on your xsl processor and postprocessing.