Help, Error

[PunkGo]

hey, heres my code

<?

if ($submit = "Login") 
{

  mysql_connect("JOEYOWNZ", "punkgo", "*******") or                

    die ("Could not connect to database");

  mysql_select_db("users") or
    dir ("Could not select database");   

$result=mysql_query("select * from users where username='$username'") 
             or die ("cant do it");

while ($row=mysql_fetch_array($result)) { 
 if ($row["password"]==$password ) 
  { 
    printf("Successfully Logged In!"); 
  }else{
    print("Nope");

   }
 } 
}
?>

i know that $username is not a variable, but when i change it to like, $_REQUEST it says it cant do it......then whe i clikc login, it brings up this,

Notice: Undefined variable: username in c:\appserv\www\login.php on line 14
cant do it

anyone know why????thx/

[bastien]

assuming that the password/username come from a form then you need to use $POST['username'] and $POST['password'] to access the element from the form...register_globals, which is a function that allowed the use like you've shown has been turned off to prevent hacker problems