<script language="JavaScript"> function goThere() { if (window.document.form_sites.select_sites.value.substring(0,7) == "http://" || window.document.form_sites.select_sites.value.substring(0,8) == "https://") { the_site = window.open(window.document.form_sites.select_sites.value) } else { enterWebsite() } } function enterWebsite() { if (window.document.form_sites.select_sites.value == "other") { prompt_url = prompt("ENTER WEB ADDRESS","http://") } if (prompt_url.substring(0,7) != "http://") { alert("PLEASE ADD THE \"http://\" PREFIX") } else { window.open(prompt_url,"the_window") } while (prompt_url.substring(0,7) != "http://") { enterWebsite() } } </script>

<form name="form_sites"> <select name="select_sites" onChange="goThere()"> <option value="http://www.codetukyang.com">กลับไปหน้าหลัก</option> <option value="http://www.thaiwebcreator.com">อยากทำ E-COMMERCE คลิ๊ก</option> <option value="http://www.hotmail.com">HOTMAIL</option> <option value="http://www.nongkhaiweb.com">หนองคาย</option> <option value="http://www.gazib.com">GAZIB</option> </select> </form>