textarea clear in RJS stopped working with 2.1.1

Hi - I have an RJS that says

page["textarea_id"].clear that works fine with rails 2.0.2 but is broken with 2.1.1 - I get an error message:

ActionView::TemplateError (undefined method `' for #<Enumerable::Enumerator:0x2b31d31cc598>)

So, how do I clear a text_area now? Also, is there a reference for page somewhere?

Thanks, Dino