Javascript and Rails code

Javascript function to SAVE selected point: 

function tripWaypointSave(m){
    for (x in allmarkers)
      {
        if (allmarkers[x].get("MarkerID") == m)
        {
            allmarkers[x].set("DelFlag", "N");
            for (y in allinfo)
              {
                //Close the corresponding info window
                if (allinfo[y].get("MarkerID") == m)
                {
                    allinfo[y].set("DelFlag", "N");
                    allinfo[y].close();
                                // Correct info box now closed BUT HOW TO CALL THE RAILS ACTION?
                                //    remote_function(:url => { :action => "add_to_trip"} );
                }
              }
        }
      }   
   
    marker.setMap(null);
    waypointInfo.close();
}

Rails action (for test purposes this is presently just a button that uses ajax to add a new line to the page without refreshing the map).

<% form_remote_tag :url => {:action => "add_to_trip"} do %>
    <%= submit_tag "Add to Trip 2"%>
<% end %>