How to POST a django form with AJAX & jQuery

Since you are using jQuery why not use the following:

<script language="JavaScript">
    $(document).ready(function() {
        $('#YOUR_FORM').submit(function() { // catch the form's submit event
            $.ajax({ // create an AJAX call...
                data: $(this).serialize(), // get the form data
                type: $(this).attr('method'), // GET or POST
                url: $(this).attr('action'), // the file to call
                success: function(response) { // on success..
                    $('#DIV_CONTAINING_FORM').html(response); // update the DIV 
                }
            });
            return false;
        });
    });
</script>

EDIT

As pointed out in the comments sometimes the above won’t work. So try the following:

<script type="text/javascript">
    var frm = $('#FORM-ID');
    frm.submit(function () {
        $.ajax({
            type: frm.attr('method'),
            url: frm.attr('action'),
            data: frm.serialize(),
            success: function (data) {
                $("#SOME-DIV").html(data);
            },
            error: function(data) {
                $("#MESSAGE-DIV").html("Something went wrong!");
            }
        });
        return false;
    });
</script>