title: link_to_remote and link_to in Rails 3
body: <p>I'm a newbie spanish Rails developer. ¿Can u help me with a problem with Rails?</p>
  
  <p>I have an application with RoR 2 and Google maps and i catch X and Y coord
  to send to a controller. I use :with parameter</p>
  
  
  :catastro,:url =>
  {:controller => "instalacions", :action => "catastro_ajax" }, :with=>"'coordx='+$('instalacion_longitud').value+'&coordy='+$('instalacion_latitud').value" %>
  
  <p>In the method :with i pass values from input text using prototype, but in Rails 3 the instruction link_to haven't :with method and i don´t know how to pass values from input text to a controller.</p>
  
  <p>How can i migrate this instruction to Rails 3? I only need know how to
  capture the input text values to send to the controller.</p>
  
  <p>Thanks!!</p>
  
  <p>PS: Sorry for my english!!!!</p>