servlet and xml/xsl

Please help with servlet.

I need to make a portion of the xml / xsl that is attached to this hide an aspect of the interface. I have already tried to hide the aspect required in xsl and it did not work. In that case, I was using the parentid as a variable which gets passed. I am stuck now.

The portion that did not work was this:

<xsl:variable name="parentId" select="substring-before(substring-after(concat($querystring, '&amp;'), 'parentid='), '&amp;')"/>
<xsl:if test="@id = 'SelectReporting' and not(contains('#2#10#192#15#169#189#230#', concat('#', $parentid, '#')))">
                                           

I wonder if I need to write something in the servlet to address this issue or if I am looking in the wrong place. Thanks, M.
doLogin.txt
Midani22Asked:
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gudii9Commented:
>>aspect of the interface.

Can you please elaborate on this. What are you trying to hide, where.
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Midani22Author Commented:
What I mean is that I think the parentid from above (mentioned above) is ALREADY being made available via a session variable. Therefore, no need to refer to it being passed on the querystring,or to provide it as a variable at all on the xsl file.

I wonder if the second statement is correct from above. Based on the parent id, it would either show or hide a button on the interface, which corresponds to

this xsl file:

window.open(servlet + '?sdate=' + d1 + '&edate=' + d2+ '&caseid=' + document.form1.caseid.value+ '&homeid=' + document.form1.homeid.value+ '&parentid=' +  document.form1.parentid.value+ '&userid=' + document.form1.userid.value+ '&mode=' + document.form1.mode.value);
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Midani22Author Commented:
hard time finding the code for processing the XSLT.
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