Rails - Apr 2005 - Submitting form using link_to

I''ve got a form with a paginator and I''d like to save the
contents of the
form whenever the user moves to a different page. Since the form contents 
aren''t submitted when a link is clicked, I thought I''d just
change the
action of the form to the URL of the paginator link and then submit the form 
using form.submit().
 The form submits but I keep getting a 404 Not Found error when I click the 
link. To isolate the problem, I put in the following submit button:
 <input type=submit>
 Still the same Not found error. Weird. Other forms in my app work with a 
submit button. Upon some investigation, I''ve found that the submit
button
requires the name of the controller in the ''name'' attribute or
you get a Not
Found error. Replaced the submit button with the following:
 <input type=submit name=''my controller name''>
 Now the form submits as expected.
 So, the questions are:
 * why does the submit button require the controller name when it is present 
in the form''s action attribute (action="controller/action")?
 * how can I successfully submit a form after changing it''s action to 
include the paginator parameters using javascript?
 I''d like to avoid creating hidden fields for paginator params etc.


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Responding to my own question. I found a work around but I think this
may be a bug/undocumented feature.

As described before, I tried to submit a form using javascript. I
needed to do this so that the form contents would get submitted (and
saved) when someone moved around using the paginator links.

I copied the link''s href into the form''s action using
javascript and
then form.submit(). This always resulted in a 404 not found (even
though the links worked by themselved)

Turns out, I need to add a hidden field with the name of the
controller in the form to avoid this problem. eg.

<input type=hidden name=''controller name''
value=''''>

The same problem (404) arises if the submit button does not have
name=''controller name'' attribute.

Can someone explain this behaviour. Is this a bug?