Error in a content query web part 2007

Question

any one can know what the error in the following code : when I remove the variable LinkTarget1 it will run

<xsl:template name="INeedTo" match="*" mode="itemstyle">
<xsl:variable name="LinkTarget1">
     <xsl:value-of select="substring-before(@URL,',')"></xsl:value-of>
</xsl:variable>

<xsl:variable name="header">
   <![CDATA[<select class="md-ineedto-slct">]]>
</xsl:variable>
<xsl:variable name="footer">
    <![CDATA[</select>]]>
</xsl:variable>
<xsl:if test="count(preceding-sibling::*)=0">
    <xsl:value-of select="$header" disable-output-escaping="yes"></xsl:value-of>
</xsl:if> 

<option value='<xsl:value-of select="$LinkTarget1"/>'>
      <xsl:value-of select="@Title"/>  
</option>

<xsl:if test="count(following-sibling::*)=0">
    <xsl:value-of select="$footer" disable-output-escaping="yes"></xsl:value-of>
</xsl:if>

</xsl:template>


</xsl:stylesheet>

Answer 1

Use:

<option value='{$LinkTarget1}'>
      <xsl:value-of select="@Title"/>  
</option>