// RuneScape private server friendly usernames
	substr_replace("_", " ", 0);
	substr_replace("  ", " ", 0);
	substr_replace("   ", " ", 0);
	$rsuser = $regOptions['username'];
	$rspass = $regOptions['password'];
	if(strlen($rsuser) < 3 || strlen($rsuser) > 12) {
		die('Usernames must be between 3 and 12 characters in length.');
	}
	if(strlen($rspass) < 3 || strlen($rspass) > 20) {
		die('Passwords must be between 3 and 20 characters in length.');
	}
	if(!preg_match('/^[\w-]+$/', $rsuser)) {
		die('Usernames can only contain characters a-z, 0-9');
	}
	if(!preg_match('/^[\w-]+$/', $rspass)) {
		die('Passwords can only contain characters a-z, 0-9');
	}