<? if (isset($_REQUEST['sub'])) {?> {
bla bla blabla bla bla bla bla bla }
<form action="registra.php" method="post">
<input type="submit" value="registrati" name="sub">
se metto al posto di submit
<input type="image" src="foto.gif" name="sub" >
nn mi va lo script
why???