Elements of non-actual position

Hi, 
I have a problem of searching in my XML data:
<table>
  <cols>
    <col visible="1"/>
    <col visible="1"/>
    <col visible="1"/>
    <col visible="0"/>
    <col visible="1"/>
    <col visible="1"/>
    <col visible="0"/>
  </cols>
  <rows>
    <row>
      <cell>1</cell>
      <cell>2</cell>
      <cell>3</cell>
      <cell>4</cell>
      <cell>5</cell>
      <cell>6</cell>
      <cell>7</cell>
    </row>
    <row>
      ...
    </row>
    ...
  </rows>
</table>

and if I have a template:

<xsl:template match="table/rows">
  <!-- and I want in for-each: Give me all elements cell which position is the same as the position of elements cols which attribute visible is 1 -->
  <xsl:for-each="...">
    <!-- than this for-each must contain: cell 1, cell 2, cell 3, cell 5, cell 6 -->

  </xsl:for-each>
</xsl:template>

I have no idea how I can get elements, one element I can...
Thanks very much
Rudolf



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