[Zope] How to get name of calling DTML or script..

I have a python script which needs to redirect the browser to the page that called the script. In other words, if I am on the a page called "test" and I call a script named "blah", I want the blah script to do the following (among other things): ... context.request.RESPONSE.redirect(x) where x is the name or URL of the page that called the script. Make sense? Any ideas? Kevin