Javascript in html write to file

I pulled out my general .HTA read/write routines and dropped them in here for you.

Removed the XHTML stuff and switched to the HTML 5 doctype
Cleaned up markup to be HTML5 compliant.
Fixed the ID‘s in your INPUTS. The label element matches by ID, not name.
Added a return false to your form.

General notes:

Only constructors should start with a capital letter.
This must be saved with a .HTA file name
Needless to say, this is windows only.

<!doctype html>
<html>

<script>

var ie_writeFile = function (fname, data) {
    var fso, fileHandle;
    fso = new ActiveXObject("Scripting.FileSystemObject");
    fileHandle = fso.CreateTextFile(fname, true);
    fileHandle.write(data);
    fileHandle.close();
  };

var ie_readFile = function (fname) {
    try {
      fso = new ActiveXObject("Scripting.FileSystemObject");
      var fso, filehandle, contents;
      filehandle = fso.OpenTextFile(fname, 1);
      contents = filehandle.ReadAll();
      filehandle.Close();
      return contents;
    } catch (err) {
      return null;
    }
  };



function Write(input1, input2)
{
    var s = input1 + "," + input2;
    ie_writeFile("test.txt", s);
}

function validateForm() {
    var x1=document.userform.pwd.value;
    var x2=document.userform.re_pwd.value;
    if (x2 == x1){
        Write(document.userform.user.value, document.userform.pwd.value);
    }
    else{alert("Passwords are not the same, Re-enter password");}
}
</script>

<head>

    <link rel="stylesheet" href="https://stackoverflow.com/questions/14795357/css/screen.css" media="screen">
</head>
<body>

<div id="container">

        <h2>Create a new account <?php echo "It works!"; ?></h2>


        <!-- return false added to keep the form from reloading -->

        <form id="form1" NAME="userform" METHOD="GET" ONSUBMIT="return validateForm();return false" ACTION="">   

            <fieldset><legend>Create a new Account</legend>
                <p class="first">
                    <label for="username">Username</label>
                    <input type="text" name="user" id="user" size="30">
                </p>
                <p>
                    <label for="pwd">Password</label>
                    <input type="password" name="pwd" id="pwd" size="30" />
                </p>
                <p>
                    <label for="repassword">Re-enter Password</label>
                    <input type="password" name="repassword" id="repassword" size="30" />
                </p>

            </fieldset>             

            <p class="submit"><button type="submit" value="Submit">Signup</button></p>          

        </form> 

</div>
</body>
</html>

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