​x
 
<!DOCTYPE html>
<html>
<body>
​
<p>单击该按钮以创建 UL 和 LI 元素。</p>
​
<button onclick="myFunction()">试一试</button>
​
<script>
function myFunction() {
  var x = document.createElement("UL");
  x.setAttribute("id", "myUL");
  document.body.appendChild(x);
​
  var y = document.createElement("LI");
  var t = document.createTextNode("Tea");
  y.appendChild(t);
  document.getElementById("myUL").appendChild(y);
}
</script>
​
</body>
</html>
​
​