page param for will paginate ajax calls

gistfile1.txt

def edit
    if !!(request.referrer[-1] =~ /\A\d+\z/)
      @page = request.referrer[-1]
    else
      @page = 1
    end
  end
  
  ############## form ################
  
  <%= form_tag admin_delivery_path, method: :put, remote: true, html: { style: "display:inline;" } do |f| %>
      <div class="modal-body">
        <ul class="errors"></ul>
        <%= hidden_field_tag :page, @page %>
        ........