​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>Element 对象</h1>
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<h2>setAttribute() 方法</h2>
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<input id="myInput" value="OK">
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<p>单击“更改”将输入字段更改为输入按钮。</p>
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<button onclick="myFunction()">更改</button>
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<script>
function myFunction() {
  document.getElementById("myInput").setAttribute("type", "button"); 
}
</script>
​
</body>
</html>
​