// Performs an Ajax call to send comment data
function ajax_post_comment(curr) {
    $('ajax_result').innerHTML = 'Sending data ...';

        var url = '/ajax.php?method=ajax_post_comment';
        var pars = $('comment_form').serialize(true);
        var myAjax = new Ajax.Request(
                        url,
                        {
                                method: 'post',
                                parameters: pars,
                                onComplete: ajax_post_comment_response
                        }
        );
}

// Performs an Ajax call to send comment data
function ajax_post_comment_response(transport) {
    $('ajax_result').innerHTML = transport.responseText;

    // if there are no errors hide the form
    if (!transport.responseText.match(/Error/i)) {
        $('comment_form_wrapper').hide();
    }
}