code: function inject_script_shim () {
        if (options.include_js) {
          var script_tag = '<script type="text/javascript" src="' + options.include_js + '"></script>';
          if (options.js_insert_marker && html.indexOf(options.js_insert_marker) !== -1) {
            html = html.replace(options.js_insert_marker, script_tag);
          }
          else {
            var shims = ["</body>", "</html>", "</head>"];
            inject(script_tag, shims);
          }
        }
      }
docs: Inject a script tag pointed at the minified JS. Attempt to insert the shim before the closing body tag.