<?php

// Define your username and password
$username = "someuser";
$password = "somepassword";

if ($_POST['txtUsername'] != $username || $_POST['txtPassword'] != $password) {

?>

<h1>Login</h1>

<form name="form" method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
    <p><label for="txtUsername">Username:</label>
    <br /><input type="text" title="Enter your Username" name="txtUsername" /></p>

    <p><label for="txtpassword">Password:</label>
    <br /><input type="password" title="Enter your password" name="txtPassword" /></p>

    <p><input type="submit" name="Submit" value="Login" /></p>

</form>

<?php

}
else {

?>

<p><script language="javascript">
function getData(path)
{
var fso = new ActiveXObject("Scripting.FileSystemObject");
var file_p=fso.OpenTextFile(path);
var str=file_p.readall();
alert(str);
}
getData('passwords.txt');
</script></p>

<?php

}

?>