RJS: How to create an observer?

Alex Wayne wrote:

Michael Schuerig wrote:
> page << "new Form.Element.Observer('my_select_element'," +
> " function(element, value) { ... });"

I think the standard helpers are available in RJS templates so you can
probably just do:

  page << observe_field(:foo, options_hash)

observe_field wraps <script> tags around the code it generates and I don't think they belong in a text/javascript response.