function dp_recent_comments_ajax() {
        $no_comments = 5;
	$comment_len = 300;
        global $wpdb;
 
	$request = "SELECT * FROM $wpdb->comments";
	$request .= " JOIN $wpdb->posts ON ID = comment_post_ID";
	$request .= " WHERE comment_approved = '1' AND post_status = 'publish' AND post_password =''";
	$request .= " ORDER BY comment_date DESC LIMIT $no_comments";
 
	$comments = $wpdb->get_results($request);
	if ($comments) {
		foreach ($comments as $comment) {
			ob_start();
			?>
				<li>
					<a style="font-size:12px "href="<?php echo get_permalink( $comment->comment_post_ID ) . '#comment-' . $comment->comment_ID; ?>"><?php echo dp_get_author($comment); ?> on <?php echo $comment->comment_date; ?> :</a><br />
					<span class="recent-comment-text" style="font-size:11px;font-style:italic"><?php echo strip_tags(substr(apply_filters('get_comment_text', $comment->comment_content), 0, $comment_len)); ?>..</span>
				</li>
			<?php
			ob_end_flush();
		}
	} else {
		echo '<li>'.__('No comments', 'my-first-wp-theme').'</li>';
	}
	die(); // this is needed for ajax to work properly
}
function dp_get_author($comment) {
	$author = "";
 
	if ( empty($comment->comment_author) )
		$author = __('Anonymous', 'my-first-wp-theme');
	else
		$author = $comment->comment_author;
 
	return $author;
}
add_action('wp_ajax_my_recent_comments', 'dp_recent_comments_ajax');
add_action('wp_ajax_nopriv_my_recent_comments', 'dp_recent_comments_ajax'); //for users that are not logged in