xslt correction

[manugm1987]

<xsl:variable name="cls">
<xsl:value-of select="./@class"/>

</xsl:variable>	
<xsl:variable name="abc">
<xsl:value-of select="html/head/style/$cls/@style"/>
</xsl:variable>

Can any one tell me wats wrong with this <xsl:value-of select="html/head/style/$cls/@style"/> line . I get node test expected here error when i run this .
Can u provide me an alternative to this .

[Jaguex]

Try

<xsl:value-of select="html/head/style/*[name(.) = $cls]/@style"/>

[manugm1987]

thank u very much for ur usefull reply