I have been trying to find a way to do that directly for a while and haven't been able to come up with anything. You can use how I made the options checkboxes work on this site <http://ooktech.com/jed/ExampleWikis/Version518Fun/>. Each checkbox puts the filter part associated with that box in a field when checked, and makes the field blank when unchecked, then to make the final filter you concatenate all of the filter strings together.
It is a roundabout way to do it, but I am starting to doubt that there is a direct way with what is currently available. In the proud tradition of engineers everywhere: if you are given an impossible problem to solve, cheat. -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/3caa627a-d70f-49cc-9464-176004ef6d2e%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

