代码示例:(标识:jsck_element_setattribute_2)
<!DOCTYPE html>
<html>
<body>

<h1>Element 对象</h1>

<h2>setAttribute() 方法</h2>

<input id="myInput" value="OK">

<p>单击“更改”将输入字段更改为输入按钮。</p>

<button onclick="myFunction()">更改</button>

<script>
function myFunction() {
  document.getElementById("myInput").setAttribute("type", "button"); 
}
</script>

</body>
</html>
运行结果: