(Beginner's question)

Xml file contents:
<Results>
 <Iteration Sample="1" Pressure="14" Derivative="0" Regression="0" />
<Iteration Sample="2" Pressure="16" Derivative="0" Regression="0" />
<Iteration Sample="3" Pressure="10" Derivative="0" Regression="0" />
<Iteration Sample="4" Pressure="25" Derivative="0" Regression="0" />
</Results>
With XSLT file:
...
<xsl:template match="Iteration">
                <td onclick="user:onClickHandler( )">
<xsl:value-of select="@Sample" />
                </td>
                <td>
<xsl:value-of select=" @Dervative" />
                </td>
                <td onclick="clickIt()">
<xsl:value-of select="@Regression" />
                </td>
</xsl:template>
...
<msxsl:script language="JScript" implements-prefix="user">
	function onClickHandler( )
        	{
        	}
</msxsl:script>

Please explain how I can call “onClickHandler” when user clicks somewhere 
inside “Sample” cell and pass sample number to this function (current 
implementation throws axception “Object required”)

Thank you,

Eugene