Object expected

Hi everyone,

Ths following code segment outputs multiple lines each beginning with "Expand". When you click on the "Expand" link, it expands/collapses a DIV section containing further text. Ultimately, you would have 4 lines such as this that could all be expanded/collapsed in such a manner. The code works in that the appropriate section will expand/collapse, but for some reason, I continue to get a javascript error stating "Object Expected" and I don't know why. Any help would be greatly appreciated. Thanks.

<script language="JavaScript">
function showDivSection(div) {
   div.style.display='';
}
               
function hideDivSections(div) {
   div.style.display='none';
}
                         
function ExpandCollapse(div) {
   if (div.style.display == '') {
      hideDivSections(div);
}
else if (div.style.display == 'none'){
   showDivSection(div);
   }
}              
</script>    

<xsl:param name="position"><xsl:value-of select="position()"/></xsl:param>
         
<tr class="title">
  <td colspan="1">
  <a href="javascript:doNothing()">
    <xsl:attribute name="onClick">ExpandCollapse(document.getElementById('<xsl:value-of select="xalan:evaluate($position)"/>'));</xsl:attribute>
  Expand
  </a>
  Locale Information (<xsl:value-of select="om:Name"/>)
  </td>
  <td>
    <input type="checkbox">Host input complete</input>
  </td>
</tr>
<tr>
  <td>
    <div>
      <xsl:attribute name="id"><xsl:value-of select="xalan:evaluate($position)"/></xsl:attribute>    
      <xsl:call-template name="LM"/>
      <br/>                                  
    </div>
  </td>
</tr>