in the form just have this
<input type="Text" name="username">
and in the form action page after you get the value of username using either
$POST['username'] or $GET['username'] or just $username, depending on wheter you are using the form method as POST, GET or earlier version of PHP, just do
//$username = $POST['username'];
// OR
//$username = $GET['username'];
// OR
//$username = $username
$capusername = $username;
// now enter into DB
reg
kevin