[Zope] anchors won't work anymore with querystring as href

Hello, Not sure if this is a Zope topic. For some reason i use links to different files in the form of a querystring: <a href="?help#topic" target="_top"> should point to the dtml document help, to the anchor 'topic'. but now anchors like #topic won't work anymore. Anybody knows of a workaround for this? Cheers, Dirk