I am using a child theme of Twenty Twelve. I want to replace "Leave a Reply" with a small gif. Looking at the 'content.php' file, I found the code I need to edit. But how do I insert an image? I'm html and css savvy, but php always gets me. Here's the line I need to edit...
<?php comments_popup_link( '<span class="leave-reply">' . __( 'Leave a reply', 'twentytwelve' ) . '</span>', __( '1 Reply', 'twentytwelve' ), __( '% Replies', 'twentytwelve' ) ); ?>
Instead of "leave a reply" I want it to show this image:
I know how to do it in css but then it would just be a bg image.