code: function() {
              if (typeof read(obj.name) == 'undefined') {
                  return false;
              }
  
              var removeCookie = obj.name + '=;'
                  + 'expires=Thu, 01 Jan 1970 00:00:01 GMT;'
                  + (obj.path ? 'path=' + obj.path + ';' : '')
                  + (obj.domain ? 'domain=' + obj.domain + ';' : '')
                  + (obj.secure ? 'secure;' : '');
  
              return (document.cookie = removeCookie);
          }
docs: Remove cookie