JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
 <form id="form_year" action="/" method="post">
 <input type="hidden" name="year" value="2015">
 <input type="hidden" name="nmbr" value="22">
 <input type="hidden" name="code" value="5Tvfr5T">
 <div class="button-small"><input type="submit" name="" value="Submit"></div>
 </form>
</div>

JavaScript

$(document).ready(function(){
        var posted = false;
        $('#form_year').submit(function(){
            if (!posted) {
                var data = $(this).serialize();
                $.post('process_year_data.php', data, function(data){
                    $("#form_year").fadeOut(500).hide(function(){
                        $("#container").fadeIn(500).show(function(){
                            $("#container").html(data);
                        });
                    });
                });
                posted = true;
                return false;
            }
        });
    });