docs: function() {
              var $el = this.element,
                  header = $el.hasClass( "ui-header" ),
                  offset = Math.abs( $el.offset().top - this.window.scrollTop() );
              if ( !header ) {
                  offset = Math.round( offset - this.window.height() + $el.outerHeight() ) - 60;
              }
              return offset;
          }