function is_email_valid($email)
{
if(eregi("^[a-z0-9\._-]+@+[a-z0-9\._-]+\.+[a-z]{2,3}$", $email)) return TRUE;
else return FALSE;
}
$email = trim($email);
if (!is_email_valid($email))
{
$error[] = "You did not enter a valid e-mail address. Please go BACK and try again.";
}
if($error != ""){
?>