为什么不行？？？

Question

<script language="JavaScript">
var xmlHTTP = new ActiveXObject("Microsoft.XMLHTTP");
xmlHTTP.open("GET","http://www.csdn.net/images/homeimage/csdn.gif",false);
xmlHTTP.send();
// alert(xmlHTTP.getAllResponseHeaders());
var adoStream = new ActiveXObject("Adodb.Stream");
adoStream.Type = 1;
adoStream.open();
adoStream.write(xmlHTTP.responseStream,2);
adoStream.SaveToFile("c:\\stream.gif",2);
adoStream.close();
adoStream = null;
xmlHTTP = null;
</script>