<?php
		
if(get_the_title($post->post_parent) != get_the_title(' ' , ' ',false))	{ 
				
wp_list_pages("title_li=&child_of=".$post->ID.""); 
			
} else { 
			
wp_list_pages("title_li=&child_of=$post->post_parent"); 
			
}
			
?>