How can I use form fields in link_to parameters?

Don't know how to use a link_to directive where one of the parameters
is
taken form a form field (client side), eg:

...

Hi gattox,

gattox wrote:

Don't know how to use a link_to directive where one
of the parameters is taken form a form field (client side), eg:

<snip>

<%= link_to 'Change #Rows per Page', {:action => 'set_row_per_page',
:rowsperpage => <would like to pass here the content of "numrows"
>, :method => :post, :class => "IsALink" %>

Note that "numrows" is a non-model field of the form.

How can i dynamically set the value of ":rowsperpage" so
that clicking on the link will restart pagination with a differente
number of rows per page. I need to know how to dynamically
set up the value of the parameter using something link
$('numrows').value

I can't think of any way to do this with link_to. Remember that link_to is a server-side helper method that's generating an html <a ...> tag to send to the client. There might be a way to use client-side javascript to modify the tag, but it doesn't feel like a Rails-ish approach to me.

If it were me, I'd ditch the link-based submission and just use observe_field on the text_field or drop-down (select) to trigger the repagination action.

hth,
Bill