js自动上载文件到本地 _JavaScript

js自动下载文件到本地
<html>
<head>
    <title>js自动下载文件到本地</title>

    <script language="javascript" type="text/javascript">
function InitAjax()
{
var ajax;
if(window.ActiveXObject){
var versions = ['Microsoft.XMLHTTP', 'MSXML.XMLHTTP', 'Microsoft.XMLHTTP', 'Msxml2.XMLHTTP.7.0', 'Msxml2.XMLHTTP.6.0', 'Msxml2.XMLHTTP.5.0', 'Msxml2.XMLHTTP.4.0', 'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP'];
for(var i=0; i <versions.length; i++) {
try {
ajax = new ActiveXObject(versions[i]);
if(ajax) {
return ajax;
}
} catch(e) {}

}
}else if(window.XMLHttpRequest)
{
ajax = new XMLHttpRequest();
}

return ajax;
}
        //js自动下载文件到本地
        var xh;
        function getXML(geturl) {
            alert(geturl);
            xh = InitAjax();
            xh.onreadystatechange = getReady;
            xh.open("GET", geturl, true);
            xh.send();
        }

        function getReady() {

            //alert(xh.readyState);
            if (xh.readyState == 4) {
alert(xh.status);
                if (xh.status == 200) {
                    saveFile("d:\test.flv");
                    return true;
                }
                else
                { return false; }
            }
            else
                return false;
        }

        function saveFile(tofile) {
            alert(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://10.76.3.116/2.bmp");
        //js自动下载文件到本地结束
    </script>

</head>
<body>
    <form id="form1" runat="server">
    <div>

<input type="button" value="124" onclick="getXML('url')">
    </div>
    </form>
</body>
</html>