I'm new in XSLT.I want to use a variable to store Id as a parameter like this :
<xsl:for-each select="NewDataSet/Table">
<tr>
<td style="font-family: Verdana;font-size : 8pt;color:blue">
<xsl:variable name="id" select="Id" />
<xsl:value-of select="Id"/>.
</td>
<td>
<a href="showCatalog.aspx?id='$id'" class="catalogLink" ><xsl:value-of select="Name"/> </a>
</td>
</tr>
</xsl:for-each>

but this code doesn't work properly.
I want href property in tag a should be"...showCatalog.aspx?id=1(=2,34,ect..):(
Can any one help me ?
Thanks you very much !

You need what's called an attribute value template (AVT). --

Joe (Microsoft MVP - XML)

Thanks for your explanation !

To substitute a variable (or any XPath expression) in a literal attribute value, use an attribute value template:

<a href="showCat.aspx?id={$id}">...</a>

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference