发布于 由chunhuanmo2

HTML DOM getElementsByName() 方法

HTML DOM getElementsByName() 方法

HTML DOM Document 对象

定义和用法

getElementsByName() 方法可返回带有指定名称的对象的集合。

语法

document.getElementsByName(name)

该方法与 getElementById() 方法相似，但是它查询元素的 name 属性，而不是 id 属性。

另外，因为一个文档中的 name 属性可能不唯一（如 HTML 表单中的单选按钮通常具有相同的 name 属性），所有 getElementsByName() 方法返回的是元素的数组，而不是一个元素。

实例

<html>
<head>
<script type="text/javascript">
function getElements()
  {
  var x=document.getElementsByName("myInput"); alert(x.length); } </script> </head> <body> <input name="myInput" type="text" size="20" /><br /> <input name="myInput" type="text" size="20" /><br /> <input name="myInput" type="text" size="20" /><br /> <br /> <input type="button" onclick="getElements()" value="How many elements named 'myInput'?" /> </body> </html>
<html>
<head>
<script type="text/javascript">
function getElements()
  {
  var x=document.getElementsByName("myInput"); alert(x.length); } </script> </head> <body> <input name="myInput" type="text" size="20" /><br /> <input name="myInput" type="text" size="20" /><br /> <input name="myInput" type="text" size="20" /><br /> <br /> <input type="button" onclick="getElements()" value="How many elements named 'myInput'?" /> </body> </html>

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