将以下内容放入functions.php:

if (! empty($GLOBALS[\'pagenow\']) && \'post.php\' === $GLOBALS[\'pagenow\'])
    add_action(\'admin_footer\', \'trash_click_error\');
function trash_click_error() {
    echo <<<JQUERY
<script>
    jQuery(function($) {
        $(\'#delete-action a\').unbind();
        $(\'#delete-action a\').click(function(event) {
            event.preventDefault();
            alert(\'Error!\');
            setTimeout(
                function() {
                    $(\'#save-action .spinner\').hide();
                    $(\'#publish\').removeClass(\'button-primary-disabled\');
                },
                1
            );
        });
    });
</script>
JQUERY;
}