>>Now I only want to know the way to get a node which name I have listed in
string parameter passed to a template. This is the main problem for me now.

you mean like this?

...
<xsl:param name="the-name"/>
<xsl:variable name="the-value">
	<xsl:copy-of select="//*[local-name()=$the-name]"/>
</xsl:variable> 
...



 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list