学习如何使用javascript/jquery设置select只读不可用的属性值

js控制select不可用

<select name="qipa250" id="qipa250">
        <option value="1">奇葩</option>
        <option value="2">奇葩天地网</option>
</select>
<script>
        document.getElementById('qipa250').disabled = true;
</script>

jquery控制select不可用

<select name="qipa250" id="qipa250">
        <option value="1">奇葩</option>
        <option value="2">奇葩天地网</option>
</select>
<script>
          $("#qipa250").attr('disabled', 'true');
</script>

js控制select可用

<select name="qipa250" id="qipa250" disabled="true" >
        <option value="1">奇葩</option>
        <option value="2">奇葩天地网</option>
</select>
<script>    
 document.getElementById('qipa250').removeAttribute("disabled");
</script>

jquery控制select可用

<select name="qipa250" id="qipa250" disabled="true" >
        <option value="1">奇葩</option>
        <option value="2">奇葩天地网</option>
</select>
<script>    
   $("#qipa250").removeAttr('disabled');
</script>