Ajax Contact form plugin [closed]

wp_register_script('ajcontact', plugins_url("/inc/ace.js", __FILE__),array('jquery'));
wp_localize_script('ajcontact', 'MyAjax', array( 'ajaxurl' => admin_url( 'admin-ajax.php' ) ));
wp_enqueue_script('ajcontact');

And then in your ace.js do

jQuery.post(MyAjax.ajaxurl, data, ....