You don't have Javascript enabled error when views caching is enabled

If you have views caching enabled, the themed form element output does not get regenerated for each page load. However, the hierarchical_select_process() #process function does get called for every page load. This seems to be where the $hsid is set.

The result is that the Form HTML, and what the Javascript is looking for go out of sync, with $hsid incrementing by one on every page load, with the actual HTML on the page not changing to reflect the new $hsid.