Help with theme setting page

Hello,

I’m reading this blog post: http://www.onedesigns.com/tutorials/how-to-create-a-wordpress-theme-options-page, and I would like to know what I need to change so that instead of using [code]<?php echo $sa_settings['footer_copyright']; ?>[/code] I use [code]<?php get_option('sa_footer_copyright'); ?>[/code]

I am asking this because I can’t use [code]echo $sa_settings['footer_copyright'];[/code] in my function.php file without getting an error message.

Can you please help me with this?

Thanks