directly in the body tag line:
<body <?php body_class( get_stencil() ); ?>>
http://codex.wordpress.org/Function_Reference/body_class#Adding_More_Classes
directly in the body tag line:
<body <?php body_class( get_stencil() ); ?>>
http://codex.wordpress.org/Function_Reference/body_class#Adding_More_Classes