How to comment/uncomment section of XML file with JAXP?

Hi,
I need to periodically under some condition, comment or uncomment a section of my XML file. I want to know is there a way that I can do it with JAXP?
I am using JDK 1.5
Thanks,

Hi Sachi,
>>Now I have to pupulate flat file where 1st row of the file should always be field names.
Duplicate the target node and map you field names to the first instance and the mapping logic to the next instance
eg:
Suppose your target structure is:
-root
-->Details
>FName
>LName
Do a Mapping like this:
-root
-->Details
><FName>FName </FName>
><LName>LName </LName>
-->Details (use mapping logic hereafter)
><FName>
><LName>
Regards
Suraj

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