test.js

function restoreDocument() {
      // if document exists, load it from the session storage
      if (sessionStorage["document"]) {

          $("#txReconnectMsg").show(); // hide dialog

        TXTextControl.loadDocument(
            TXTextControl.streamType.InternalUnicodeFormat,
              sessionStorage.document);
      }
      else
          $("#txReconnectMsg").hide(); // hide dialog
}