markbac3 on "[Plugin: WooCommerce - excelling eCommerce] Added a function, now I can't see the site or the admin area"

I pasted an existing function into Woocommerce's functions.php file (I believe that was the name) in the space indicated for adding custom functions.

Now I get a blank screen when I try to load my site, and I can't access the back-end admin area either. In other words, I can't see more site or access it to fix it.

Can anyone suggest a way for me to get back in to my admin area?

Thanks. Mark

http://wordpress.org/extend/plugins/woocommerce/