[Zope] newbie zope ? <dtml-var standard_header>

How can you add "<dtml-var standard_header>" by default(like newly created dtml method or doc in zope) to a newly created document made my a form. When they create a document using the form I want <dtml-var standard_header> to be included in the top of the body. I tried <textarea><dtml-var standard_header></textarea> thinking it would work, but what resulted was not what i intened,instead i got the values in the variable, which makes perfect sense, now that I think of it. thanks ahead! -jon