diff --git a/static/js/utils.js b/static/js/utils.js
index 7dc858d..f39e8ea 100644
--- a/static/js/utils.js
+++ b/static/js/utils.js
@@ -45,6 +45,19 @@ function NvHTTP(address, clientUid) {
     _self = this;
 };
 
+function ab2str(buf) {
+  return String.fromCharCode.apply(null, new Uint16Array(buf));
+}
+
+function str2ab(str) {
+  var buf = new ArrayBuffer(str.length*2); // 2 bytes for each char
+  var bufView = new Uint16Array(buf);
+  for (var i=0, strLen=str.length; i < strLen; i++) {
+    bufView[i] = str.charCodeAt(i);
+  }
+  return buf;
+}
+
 NvHTTP.prototype = {
     refreshServerInfo: function () {
         return sendMessage('openUrl', [ _self._baseUrlHttps + '/serverinfo?' + _self._buildUidStr(), false]).then(function(ret) {