View wp-posts in dropdown

<form action="<? bloginfo('url'); ?>" method="get">
	<select name="page_id" id="page_id">
	<?php
		global $post;
		$args = array( 'numberposts' => -1); 
		$posts = get_posts($args);
		foreach( $posts as $post ) : setup_postdata($post); ?>
			<option value="<? echo $post->ID; ?>"><?php the_title(); ?></option>
		<?php endforeach; ?>
	</select>
	<input type="submit" name="submit" value="view" />
</form>