Simple snippet copied and pasted from here, why not working?

Simple snippet copied and pasted from here, why not working?

Hello,

I am replacing the whole stuff by something that I (finally) managed it to make it work. Yet, I have some doubts about this. My problem is that I am not loading that document value that you see, which is the index of the first dropdown list to a controller (I am working in an MVC env). So I introduced this extra callback function to see what happened, but, actually, I think this callback is not telling me anything, or is it? when I move the select box it does get executed, but why am I not getting anything in my controller file (where I have the code to fetch it).

The extra function that pops the alert box actually gets executed if I move the select list but that does not mean that the value is actually loaded to the controller. 

Aside from this, I cannot get the code properly formatted here! even though i am clicking on "add code" so it looks very ugly

  1. <script src="http://code.jquery.com/jquery-latest.js"></script>
    <script type="text/javascript">
    //jquery code for source list



    $(document).ready(function()
    {
    $('#country').change(function()
    {
    if ($(this).val()!='')
    {
    $("#source").load("/CI-3/application/controllers/control_form.php/",{pais_id: $(this).val()}, function() {
    alert('Load was performed.')});
    }

    });

    }); // end of first function
    </script>

    </head>


    <body>

    <?php echo form_open('control_form/add_all'); ?>
    <label for="country">Country<span class="red"></span></label>
    <select id="country" name="country">
    <option value="">Select</option>
    <?php

    foreach($result as $row)
    {
    echo '<option value="' . $row->pais_id . '">' . $row->pais_name . '</option>';
    }

    ?>
    </select>

    <label for="source">Source Language<span class="red"></span></label>
    <!--this will be filled based on the tree selection above-->
    <select id="source" name="source">
    <option value="">Select</option>

    <?php


    foreach($source as $row)
    {
    echo '<option value="' . $row->id_from . '">' . $row->from_name . '</option>';
    }

    ?>


    </select>

    <?php echo form_close(); ?>