How can I checking whether any one of my inter table contain bor der at

Ihave the following xhtml
<table>
        <tr>
                <td>
                        <table border="1">
                        </table>
                </td>
                <td>
                        <table>
                                <tr>
                                        <td>
                                                <table border="1">
                                                </table>
                                        </td>
                                </tr>
                        </table>
                </td>
        </tr>
</table>
How can I checking whether any one of my  inter table contain border
attribute and I want to retrieve that value

I tried the following template .But it is not working
<xsl:if test="ancestor::table/@border">
</xsl:if>
Please tell me how can I solve this problem


Thanks in advance
George



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