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javascript获取select值的方法分析

WBOY
Release： 2016-06-01 09:54:31
Original
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本文实例讲述了javascript获取select值的方法。分享给大家供大家参考。具体分析如下：

1. 获取选中值得文本

<code class="language-javascript">document.getElementById("bigclass").options[window.document.getElementById("bigclass").selectedIndex].text</code>
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2. 获取数据库中的id

<code class="language-javascript">window.document.getElementById("bigclass").value</code>
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3.获取select组分配的索引id

<code class="language-javascript">window.document.getElementById("bigclass").selectedIndex</code>
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例子

<code class="language-javascript"><select name="bigclass" id="bigclass" onchange="javascript:updatePage2();">
<option value="" selected>ajax实验</option>
<option value="4">我适宜市哈</option>
</select></code>
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使用：

<code class="language-javascript">document.getElementById("bigclass").options[window.document.getElementById("bigclass").selectedIndex].text</code>
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结果是：我适宜市哈

 

使用：

<code class="language-javascript">window.document.getElementById("bigclass").value</code>
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结果是：4

 

使用：

<code class="language-javascript">window.document.getElementById("bigclass").selectedIndex</code>
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结果是：1

Related labels：
js select value selected
source：php.cn
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