<?php wp_reset_query(); ?>

                        <?php query_posts('orderby=rand&numberposts=4&posts_per_page=4');?>

                        <ul class="random_news">
                            
                        <?php if (have_posts()) : ?>
                        <?php while (have_posts()) : the_post(); ?>        
                            
                            
                            <li>

                            <?php if (has_post_thumbnail()):?>
                                <div class="rn_image">
                                    <?php the_post_thumbnail('thumbnail' );?>
                                </div>
                            <?php else:?>
                                <div class="rn_image">
                                    <img src="адрес изображения, когда фото нет" alt=""/>
                                </div>
                            
                            <?php endif; ?>
                                <div class="rn_body">
                                    <div class="rn_title">
                                        <a href="<?php the_permalink() ?>" title="<?php the_title(); ?>">
                                            <?php the_title(); ?>
                                        </a>
                                    </div>
                                    <div class="rn_text">
                                        <?php the_excerpt();?>
                                    
                                    </div>
                                </div>
                            </li>
                            
                        <?php endwhile; ?>
                        <?php endif;?>    
                        
                    <ul>                        
                    
                    <?php wp_reset_query(); ?>