Rails - Dec 2005 - Dynamic fields creation and accessing data

Hi friends ,
   I was trying this code and finding some errors.I am trying this to 
implement dynamic creation of invoice items in invoices using AJAX 
.Please go thru .

 I added a partial ::
<% @invoiceitem = invoiceitem -%>
 <%= text_field ''invoiceitem'',
''item_price'', ''index'' =>
 invoiceitem_counter %>
 <%= text_field ''invoiceitem'',
''item_qty'', ''index'' =>
invoiceitem_counter
 %>
Where are we initialising the counter? Please tell how is the first line
working .

In the rhtml file I have added  :

    <%= form_remote_tag(:update => "my_list",
                       :url => { :action => :add_new_item },
                       :position => "bottom" ) %>

            <%= submit_tag "Add New Item" %>
       <%= end_form_tag %>
   <form action="/ajax/save_items" method="post">
    <ul id="my_list">
      <li>Original item... please add more!</li>
    </ul>

    <%= submit_tag ''Update'' %>
   </form>
I have added like this for creating a dynamic generation of text boxes
using ajax.

And in the controller class ,

  def add_new_item

   render(:partial => ''invoiceitems'', :collection =>
@invoice_items)

  end
  def save_items

	 @items = []
	params[:invoiceitem].each do |key, item|
		@items = InvoiceItem.new(item)
	end
   end

Please help my in implementing this requirement .

Thanks and regards,
Naroor Rathish.

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