Untitled

web 1
<?php
if(isset($_POST['enviar'])){
    $username = $_POST['username'];
    $password = $_POST['password'];
}
?>
<html>
<head>
<title>CIT.SERVEFTP.COM</title>
</head>
<body bgcolor='#080000'>
<form name="formulario" method="post" action="usuarioid.php">
<table border="5" cellpadding="0" cellspacing="0" summary="">
 <tr><td align="center"><font color="red">Usuario:</td><td></font><input type="text"  size="9" name="username"></td></tr>
 <tr><td align="center"><font color="red">Password:</td><td></font><input type="password" size="9" name="password"></td></tr>
  <tr><td colspan="2" align="center"><input type="submit" value="Acceder" name="enviar"></td></tr>
</table>
</form>
</body>
</html>

web 2
   <?php
session_start();
    if($_POST["username"] == "123" && $_POST["password"] == "123"){
        $_SESSION['username'] = $_POST['username'] ;
        $_SESSION['password'] = $_POST['password'] ;
        $_SESSION["autenticado"]= "SI";
        header ("Location: bienvenido.php");
    }
    else {
        echo "Debes loguearte";
    }
?>