Does the current page got any children?

hip_has_children.php

if (!function_exists('hip_has_children'))
{
	function hip_has_children($child_of = null)
	{	
		 	// original code based on http://forrst.com/posts/WordPress_has_children_function-DmS
			$posttype = get_post_type($child_of);
		
	        if(is_null($child_of)) {
	                global $post;
	                $child_of = ($post->post_parent != '0') ? $post->post_parent : $post->ID;
	        }
	        return (wp_list_pages("child_of=$child_of&post_type=$posttype&echo=0")) ? true : false;
	}
}