Wordpress Ajax testing plugin

<?php

/*
Plugin Name: Aajax test
 */

add_action( 'wp_footer', 'my_action_javascript' );

add_action( 'admin_footer', 'my_action_javascript' );

function my_action_javascript() {
?>
<h3 id="ajax_answer" style="clear:both; text-align: center; background: white;" ></h3>
<script type="text/javascript" >
jQuery(document).ready(function($) {

    var data = {
        action: 'my_action',
        whatever: 1234
    };

    var ajaxurl = '<?php echo admin_url( 'admin-ajax.php' ) ?>';

    $.post(ajaxurl, data, function(response) {
    $('#ajax_answer').html('Got this from the server with Ajax: ' + response);
    });
});
</script>
<?php
}



add_action( 'wp_ajax_my_action', 'my_action_callback' );

add_action( 'wp_ajax_nopriv_my_action', 'my_action_callback' );

function my_action_callback() {
    global $sitepress;

    $lang = $sitepress->get_current_language();

    echo "Current language is $lang";

    die(); // this is required to return a proper result
}