XSL to select part of XML

I'm sure this is probably simple and I'm just out of practice and lazy as well :), but here goes... I want to be able to display only an individual <class> based on what I specify in the XSL (eventually replaced by a parameter sent by some php (horse before carriage though). Anyway, here's a sample of xml and xsl. Hack and criticize away, I await your great wisdom :)
(I don't think this is going to paste well)
So for example, say I *just* want to list the Sorceror spells... (As I think about it, I would probably want to list all the <class>'s spells in their own table (as a seperate thing as well).
Thanks!

<?xml version='1.0'?>
<classes>
<class>
<name>Sorceror</name>
<spells>
<spell>
<name>Komiza</name>
<desc>Dart of Ice</desc>
<mana>1</mana>
<price>10 gold</price>
<level>1st</level>
<rlevel>1st</rlevel>
</spell>
<spell>
<name>Toduza</name>
<desc>Dart of Flame</desc>
<mana>2</mana>
<price>20 gold</price>
<level>3rd</level>
<rlevel>5th</rlevel>
</spell>
</spells>
</class>
<class>
<name>Acolyte</name>
<spells>
<spell>
<name>Motu</name>
<desc>Minor Healing</desc>
<mana>1</mana>
<price>10 gold</price>
<level>1st</level>
<rlevel>1st</rlevel>
</spell>
</spells>
</class>
</classes>

------
<?xml version='1.0'?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version='1.0'>

<xsl:output method="html"/>
<xsl:template match="/">
<table border="1">
<tr><th colspan="5"><xsl:value-of select="classes/class/name" /></th></tr>
<xsl:apply-templates select="classes/class/spells" />
<tr><th colspan="5"><xsl:value-of select="classes/class/name" /></th></tr>
</table>
</xsl:template>

<xsl:template match="class/spells/spell">
<tr>
<td><xsl:value-of select="name" /></td>
<td><xsl:value-of select="desc" /></td>
<td><xsl:value-of select="price" /></td>
<td><xsl:value-of select="level" /></td>
<td><xsl:value-of select="rlevel" /></td>
</tr>
</xsl:template>

</xsl:stylesheet>

Well, you can add an <xsl:if>. Substitue with your parameter when you get that far.

Thanks for replying. I tried that, and it still displays the Acolyte spells as well.

Before I read your reply, I tried this... (both give similar results (minus the formatting).

<?xml version='1.0'?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version='1.0'>

<xsl:output method="html"/>
<xsl:template match="/">
<xsl:if test="classes/class/name = 'Sorceror'">
<table border="1">
<tr>
<th colspan="5">
<xsl:value-of select="classes/class/name" />
</th>
</tr>
<xsl:for-each select="classes/class/spells/spell">
<tr><td>
<xsl:value-of select="name" />
</td></tr>
</xsl:for-each>
<tr>
<th colspan="5">
<xsl:value-of select="classes/class/name" />
</th>
</tr>
</table>
</xsl:if>
</xsl:template>
</xsl:stylesheet>

Ok, here you go. I actually paid attention to the output this time ;).