To check if a page has any children/subpages, insert the following into your functions.php file,

[php]

/*—————————————–
Check if a page has any children / subpages
—————————————–*/

function has_children($post_id) {
$children = get_pages("child_of=$post_id");
if( count( $children ) != 0 ) { return true; } // Has Children
else { return false; } // No children
}

[/php]

then in your template call it as follows (within an if statement usually):

[php]has_children($post->ID)[/php]