js三級聯動

======================================js文件===========================================

連接: https://pan.baidu.com/s/17Cv8KUd-xEqM-GvmnZdDVw 提取碼: 3yxc 

======================================html============================================

<p>
   <span>地址：</span>
   <select id="s_province" name="s_province"></select>  
   <select id="s_city" name="s_city" ></select>
   <select id="s_county" name="s_county"></select>
   <script type="text/javascript">_init_area();</script>
<div id="show"></div>
<i>*</i>
</p>

 

 

======================================js==============================================

<script type="text/javascript">

    var Gid  = document.getElementById ;

    var showArea = function(){

        Gid('show').innerHTML = "<h3>省" + Gid('s_province').value + " - 市" +

            Gid('s_city').value + " - 縣/區" +

            Gid('s_county').value + "</h3>"

    }

    Gid('s_county').setAttribute('onchange','showArea()');

</script>