sorting with param @attribute

hi,
given
<items>
<item id="1">
 <title>4</title>
 </item>
<item id="2">
 <title>3</title>
 </item>
<items>
i pass param <titile> and sort with
<xsl:param name="sort"/>
<xsl:for-each select="//item">
<xsl:sort select="*[name()=$sort]" />
<table>
<tr>
<td><xsl:value-of select="@id" /></td>
<td><xsl:value-of select="title" /></td>
<tr>
</table>
what i get is

<tr>
<td>2</td>
<td>3</td>
</tr>
<tr>
<td>1</td>
<td>4</td>
</tr>

<tr>
<td>1</td>
<td>4</td>
</tr>
<tr>
<td>2</td>
<td>3</td>
</tr>

thank you
jian

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