use XMLHTTP + ADODB.Stream   var XMLHTTP = new ActiveXObject("MSXML2.XMLHTTP");
   XMLHTTP.open("Get","http://192.168.8.106:81/app/作文.txt",false);
   XMLHTTP.send()  var Stream = new ActiveXObject("ADODB.Stream");
  Stream.Type=1; 
  Stream.Open();
  Stream.Write( XMLHTTP.responseBody);
  Stream.SaveToFile("C:\\downloadedfile.txt",2);