​x
 
<!DOCTYPE html>
<html>
<body>
​
<h3>如何访问 output 元素的演示</h3>
​
<form oninput="x.value=parseInt(a.value)+parseInt(b.value)">0
  <input type="range" id="a" value="50">100
  +<input type="number" id="b" value="50">
  =<output id="myOutput" name="x" for="a b"></output>
</form>
​
<p>单击该按钮可显示 output 元素的名称。</p>
​
<p><strong>Note:</strong>Internet Explorer 不支持 output 元素。</p>
​
<button type="button" onclick="myFunction()">试一试</button>
​
<p id="demo"></p>
​
<script>
function myFunction() {
  var x = document.getElementById("myOutput").name;
  document.getElementById("demo").innerHTML = x;
}
</script>
​
</body>
</html>
​