[Zope] Chicken or Egg Syndrome

Hi; I want to simply_and_elegantly achieve the following: 1. Ping the visitor's browser to determine screen resolution (easy: I know how to capture this). 2. Redirect them to a folder such as 800 or 1024 depending on the res (easy again). 3. Assign a variable within that folder via a dtml method that will be used to size elements such as image width and height (easy again). 4. Place all the documents that will need that variable in a lower folder, so that I don't have to copy all the dtml documents into folders 800 and 1024 (ah: not so easy! at least not for me). The problem appears to be that I need to cull a variable out of a Javascript that I can in turn utilize in a dtml method.So, how do I do this? TIA, BenO