Could the value of the select attribute of a xsl:param

Dear All,

Somewhere in my xsl file, I try to update the select attribute in the param element.
It is not allowed by xslt element, but I wonder is there a way ,say,the scripting to
meet my plot.

If so, how to do it?  Be more specific, how to get 
 <xsl:param name="line" select="1"/>  to <xsl:param name="line" select="2"/>

sfyang@xxxxxxxxxxxxx



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