URL formatting

      The problem i am facing is as follows:

       I want to generate the URL as follows

As of now MY URL is :

The above URL is framed from JQuery by selecting the select box value.

The JQuery i used:

    def select_filter_by_city_js
      Event.observe($('filter_by_country'), 'change', function(e) {
        window.document.location = '#{search_developments_url}' +
?search[address]=' + e.element().getValue();

In my routing file(routes.rb) : i defined for search_developments_ur

map.search_developments '/developments/find/',:controller=>

In my controller : I get the value like

def search

    location.heading = :search

    show_results = params.has_key?(:search)
@title = 'Find Developments ' + params[:search].to_s
    @search = Development::Search.new(params[:search])
    @developments = show_results ? @search.run(params[:page]) :

    respond_to do |format|
      format.html { render :action => (show_results ? 'index' :
'search') }
      format.xml { render :xml => @developments }

    I guess i need to work with routes.rb. I tried so many combinations
but no luck . can any one please advise me. what i miss here . Thanks.