從select中選擇option後如何轉到相應的資料頁面中去的JS代碼

<select onchange="selected(this)">                <optgroup label="A">                <option value="http://www.glambox.com/apple">Apple</option>              </optgroup>                            <optgroup label="B">              <option value="http://www.glambox.com/burberry">burberry</option>           </optgroup>                            <optgroup label="C">           <option value="http://www.glambox.com/index.php?route=product/manufacturer/info&amp;manufacturer_id=9">Canon</option>         </optgroup>                          <optgroup label="D">                    <option value="http://www.glambox.com/demo">demo</option>              </optgroup>                            </select>

這代代碼要求點擊相應的串連跳轉到相應的頁面，js代碼如下

<script> function selected(o){ location.href=o.value;} </script> 

上面的select也可以這樣寫

<select onchange="location.href=this.value">