text: require([
      'gitbook',
      'jquery'
  ], function (gitbook, $) {
      function removelink() {
          var link = $('a.custom-link')
          var divider = $('li.divider')
          link.remove()
          divider.remove()
          var searchText = $('#book-search-input input')
          searchText.attr('placeholder','開始搜尋')
          
          var gitbooklink = $('.gitbook-link')
          gitbooklink.before('<li class="divider"></li>')
      }
      removelink()
      gitbook.events.on('page.change', function () {
          removelink()
      })
  
  
  })
  