用java script 完成文件的读写 demo

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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title>test</title>
<script type="text/javascript">
function readFile(filename){

var fso = new ActiveXObject("Scripting.FileSystemObject");
var f = fso.OpenTextFile(filename,1);
var s = "";
while (!f.AtEndOfStream)
s += f.ReadLine()+"\n";
f.Close();
return s;
}
//写文件
function writeFile(filename,filecontent){
var fso, f, s ;
fso = new ActiveXObject("Scripting.FileSystemObject");
f = fso.OpenTextFile(filename,8,true);
f.WriteLine(filecontent);
f.Close();
alert('ok');
}

function createFolder(){
var fso, a;
fso = new ActiveXObject("Scripting.FileSystemObject");
a = fso.CreateFolder("c:\\Documents and Settings/uesr");
f.Close();
alert(a);

}
</script>
</head>
<body>


<input type="button" value="Read!" onclick='javascript: document.getElementById("inresult").innerHTML=readFile(outaddr);'/> <br>
<input type="button" value="Write!" onclick='javascript:writeFile(inaddr).innerHTML);'/><br>
<div id= "inresult"></div>



</body>
</html>