gistfile1.js

var lastFormId = 1;

function getBrandForm(){
  $('a.get_ajax_form').click(function(){
     // load the form for Brands. Call back to attach js to the form
     $.get(url, function(data){
         $('#brand_form_container').append(data.replace('%my_form_tag%', lastFormId);
         lastFormId++;
     })