Hello again Mr Panos I added code my index.php
<html>
<head>
<title>Lastik Seçici</title>
<META NAME="author" CONTENT="Panos Kyriakakis">
<meta name="description" lang="en" content="Demo page. Linked selected boxes that load items from database using AJAX">
<meta name="keywords" lang="en" content="Lastik Seçici">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-9">
<META name="verify-v1" content="2CKKXxDtxsHjE7TjmXjWJSzMj5xqXOvTrnZ27goGJSE=" />
<META name="robots" content="follow,index" />
</head>
<body>
<script src="prototype.js" type="text/javascript"></script>
<h2><a href="example.php">Lastik Seçici Program</a></h2>
<?php
include("top_script.php");
include("sc_classes.php");
$sc_ajax_select_boxes = new sc_ajax_select_boxes();
$sc_ajax_select_boxes->add_select_box('sc_page_types','page_type','type_descr','page_type','','sel1','sel_id_1','');
$sc_ajax_select_boxes->add_select_box('sc_page_types_sub','sub_type','type_descr','sub_type','st21','sel2','sel_id_2','');
$sc_ajax_select_boxes->add_select_box('sc_page_types_sub_sub','sub_type','type_descr','sub_type','st22','sel3','sel_id_3','');
$sc_ajax_select_boxes->add_select_box('sc_page_types_sub_sub','sub_type','type_descr','sub_type','st22','sel4','sel_id_4','');
$sc_ajax_select_boxes->link_select_boxes('sel1','sel2', 'page_type','t2');
$sc_ajax_select_boxes->link_select_boxes('sel2','sel3', 'page_type','st22');
$sc_ajax_select_boxes->link_select_boxes('sel3','sel4', 'page_type','st22');
$sc_ajax_select_boxes->place_jscripts();
<form method="post" action="your_script.php">
<?php
$sc_ajax_select_boxes->show_select_box('sel1');
$sc_ajax_select_boxes->show_select_box('sel2');
$sc_ajax_select_boxes->show_select_box('sel3');
$sc_ajax_select_boxes->show_select_box('sel4');
?>
<input type="submit"value="OKEY" name="B1">
</form>
?>
</body>
</html>
web site: error
Add Sumbit Button 