Problem with Expand/Collapse Sub Category

Function genCatInfor(tmp_IDCAT,tmp_CatName)
Dim tmp_showIcon,k,pcv_first,pcv_prdcount,pcv_back,pcv_end,tsT,tmp_query,pcv_CatName,pcv_prds1,tmp1,tmp2
 tmp1=0
 tmp2=0
 tmp_showIcon=0
 pcv_first=0
 pcv_prdcount=0
 maxProNameL = 22
 pcv_CatName=ClearHTMLTags2(tmp_CatName,0)
 If maxProNameL<len(pcv_CatName) then
  pcv_CatName=trim(left(pcv_CatName,maxProNameL)) & "..."
 End If
 if (pcv_exportType="0" or pcv_exportType="2") then
  pcv_end=intCount
  tmp1=0
  For k=0 to intCount
   pcv_back=pcv_end-k
   if cint(pcv_cats1(2,k))=tmp_IDCAT then
    tmp1=1
    exit for
   end if
   if pcv_cats1(2,pcv_back)=tmp_IDCAT then
    tmp1=1
    exit for
   end if
  Next
 end if
 
 if (pcv_exportType="1" or pcv_exportType="2") then
  tmp_query="SELECT products.idProduct,products.description FROM products INNER JOIN categories_products ON (products.idProduct=categories_products.idProduct AND products.removed=0 AND products.active=-1 AND products.configOnly=0) WHERE categories_products.idcategory=" & tmp_IDCAT & " ORDER BY categories_products.POrder asc,products.description ASC;"
  set rsT=connTemp.execute(tmp_query)
  if not rsT.eof then
   tmp2=1
   pcv_prds1=rsT.getRows()
   set rsT=nothing
  else
   tmp2=0
  end if
  set rsT=nothing
 end if
 if ((tmp1=1) and (pcv_exportType="0" or pcv_exportType="2")) or ((tmp2=1) and (pcv_exportType="1" or pcv_exportType="2")) then
  tmp_showIcon=1
 end if
 pcv_strTmpCat=pcv_strTmpCat & "<tr><td valign=""middle"">"
 if tmp_showIcon=1 then
  pcv_strTmpCat=pcv_strTmpCat & "<img align=""absmiddle"" name=""IMGCAT" & tmp_IDCAT & """ border=""0"" src=""images/btn_expand.gif"" onclick=""javascript:UpDown(" & tmp_IDCAT & ");"">"
 else
  pcv_strTmpCat=pcv_strTmpCat & "&nbsp;"
 end if
 pcv_strTmpCat=pcv_strTmpCat & "</td><td width=""100%"" valign=""top"" class="""&pcv_cssclass&"""><a href=""" & tempURL & "viewCategories.asp?idCategory=" & tmp_IDCAT  & """>&nbsp;" & pcv_CatName & "</a>" & vbcrlf
 if tmp_showIcon=1 then
  pcv_strTmpCat=pcv_strTmpCat & "<table border=""0"" width=""100%"" cellpadding=""0"" cellspacing=""0"" id=""SUB" & tmp_IDCAT & """ style=""display:none"">" & vbcrlf
  if ((tmp1=1) and (pcv_exportType="0" or pcv_exportType="2")) then
   For k=0 to intCount
    if cint(pcv_cats1(2,k))=tmp_IDCAT then
     pcv_first=1
     call genCatInfor(pcv_cats1(0,k),pcv_cats1(1,k))
    else
     if pcv_first=1 then
      exit for
     end if
    end if
   Next
  end if
  if ((tmp2=1) and (pcv_exportType="1" or pcv_exportType="2")) then
   if ubound(pcv_prds1,2)>pcv_numprd-1 then
    pcv_prdcount=pcv_numprd-1
   else
    pcv_prdcount=ubound(pcv_prds1,2)
   end if
   For k=0 to pcv_prdcount
    ProName=ClearHTMLTags2(pcv_prds1(1,k),0)
    If maxProNameL<len(ProName) then
     ProName=trim(left(ProName,maxProNameL)) & "..."
    End If
    pcv_strTmpCat=pcv_strTmpCat & "<tr><td>&nbsp</td><td class="""&pcv_cssclass&"""><a href=""" & tempURL & "viewPrd.asp?idcategory=" & tmp_IDCAT & "&idproduct=" & pcv_prds1(0,k) & """>" & ProName & "</a></td></tr>" & vbcrlf
   Next
   if ubound(pcv_prds1,2)>pcv_numprd-1 then
    pcv_strTmpCat=pcv_strTmpCat & "<tr><td>&nbsp</td><td class="""&pcv_cssclass&"""><a href=""" & tempURL & "viewCategories.asp?idCategory=" & tmp_IDCAT  & """>More Products...</a></td></tr>" & vbcrlf
   end if
  end if
  pcv_strTmpCat=pcv_strTmpCat & "</table>" & vbcrlf
 end if
 pcv_strTmpCat=pcv_strTmpCat & "</td></tr>" & vbcrlf
End Function